Da-Hai Xia, C. Pan, Shi-zhe Song, Weixian Jin, Wenbin Hu, Baomin Fan
s: This work was to prepare a layer of dodecyl phosphate (DDPO4) film on 2024 aluminum alloy substrate for corrosion protection by self-assembling. The prepared DDPO4 self-assembly monolayers (SAMs) properties were characterized by X-ray photoelectron spectroscopy (XPS), water contact angle measurement (CA), and electrochemical impedance spectroscopy (EIS). Experimental results indicated that DDPO4 was successfully assembled on aluminum alloy substrate via covalent bond attachment. The modified surface was hydrophobic due to the DDPO4 attached to the oxide surface and a hydrocarbon tail-up orientation. In order to build a molecular adsorption dynamics model, the impact of temperature and pH values for assembling process has also been evaluated. Accelerated corrosion test showed that the DDPO4 modified 2024 aluminum alloy substrate exhibited excellent corrosion resistance in an electrolyte containing 0.01M Cl − + 0.01M SO 42− , and no apparent corrosion pits were observed after an exposure of 96 h. The charge transfer resistance of the DDPO4 covered aluminum alloy was ∼ 100 times larger than that of the blank aluminum alloy. The results of molecular dynamic (MD) simulation for DDPO4 adsorbed on the Al 2 O 3 (110) face indicate that the head group of DDPO4 is the active group and bind as tridentate with the O in P=O bond can adsorbed on the Al 2 O 3 surface.
5:采用自组装的方法在2024铝合金基体上制备了一层用于防腐的十二烷基磷酸(DDPO4)薄膜。采用x射线光电子能谱(XPS)、水接触角测量(CA)和电化学阻抗谱(EIS)对制备的DDPO4自组装单层(SAMs)进行了表征。实验结果表明，通过共价键在铝合金基体上成功组装了DDPO4。由于DDPO4附着在氧化物表面，并且呈碳氢化合物尾部取向，修饰后的表面具有疏水性。为了建立分子吸附动力学模型，还评估了温度和pH值对组装过程的影响。加速腐蚀试验表明，DDPO4修饰的2024铝合金基片在含有0.01M Cl−+ 0.01M SO 42−的电解液中具有优异的耐蚀性，暴露96 h后未发现明显的腐蚀坑，其电荷转移电阻比空白铝合金大约100倍。对吸附在al2o3(110)表面的DDPO4进行了分子动力学(MD)模拟，结果表明，DDPO4的头基为活性基团，与P=O键中的O形成三叉键，可以吸附在al2o3表面。
{"title":"Covalent surface modification of 2024 aluminum alloy surface by self-assembly dodecyl phosphate film towards corrosion protection","authors":"Da-Hai Xia, C. Pan, Shi-zhe Song, Weixian Jin, Wenbin Hu, Baomin Fan","doi":"10.3390/cmdwc2021-10040","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10040","url":null,"abstract":"s: This work was to prepare a layer of dodecyl phosphate (DDPO4) film on 2024 aluminum alloy substrate for corrosion protection by self-assembling. The prepared DDPO4 self-assembly monolayers (SAMs) properties were characterized by X-ray photoelectron spectroscopy (XPS), water contact angle measurement (CA), and electrochemical impedance spectroscopy (EIS). Experimental results indicated that DDPO4 was successfully assembled on aluminum alloy substrate via covalent bond attachment. The modified surface was hydrophobic due to the DDPO4 attached to the oxide surface and a hydrocarbon tail-up orientation. In order to build a molecular adsorption dynamics model, the impact of temperature and pH values for assembling process has also been evaluated. Accelerated corrosion test showed that the DDPO4 modified 2024 aluminum alloy substrate exhibited excellent corrosion resistance in an electrolyte containing 0.01M Cl − + 0.01M SO 42− , and no apparent corrosion pits were observed after an exposure of 96 h. The charge transfer resistance of the DDPO4 covered aluminum alloy was ∼ 100 times larger than that of the blank aluminum alloy. The results of molecular dynamic (MD) simulation for DDPO4 adsorbed on the Al 2 O 3 (110) face indicate that the head group of DDPO4 is the active group and bind as tridentate with the O in P=O bond can adsorbed on the Al 2 O 3 surface.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76188595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ulises Martin Diaz, J. Bosch, J. Ress, D. Bastidas
{"title":"Passive film evolution over 2.5 years of lean-duplex stainless steel reinforcements embedded in mortar containing chlorides","authors":"Ulises Martin Diaz, J. Bosch, J. Ress, D. Bastidas","doi":"10.3390/cmdwc2021-10047","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10047","url":null,"abstract":"","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90414706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
s: Herein, the corrosion behavior of steel exposed to fly ash (FA) synthetic pore solution and carbonated FA synthetic pore solution is presented. A better understanding of corrosion phenomena of steel embedded in FA binder will be achieved if the corrosion mechanisms in the pore solution are disentangled. As such a more sustainable cementing material will be suitable for the construction industry. Electrochemical tests such as cyclic potentiodynamic curves (CPP) and electrochemical impedance spectroscopy (EIS) were performed in order to characterize the corrosion behavior of steel in chloride contaminated FA synthetic pore solution as well as the carbonation effect. Results showed that FA synthetic pore solution was able to repassivate the steel even with chloride contents of 0.1M NaCl. Furthermore, the combined effect of chloride and carbonation induced corrosion was observed, showing corrosion rates of 3.547 × 10 ‒5 A/cm 2 in FA carbonated pore solution containing 0.6M NaCl.
{"title":"Corrosion of steel in synthetic fly ash pore solution","authors":"Juan Bosch Giner, D. Bastidas, U. Martin, J. Ress","doi":"10.3390/cmdwc2021-10048","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10048","url":null,"abstract":"s: Herein, the corrosion behavior of steel exposed to fly ash (FA) synthetic pore solution and carbonated FA synthetic pore solution is presented. A better understanding of corrosion phenomena of steel embedded in FA binder will be achieved if the corrosion mechanisms in the pore solution are disentangled. As such a more sustainable cementing material will be suitable for the construction industry. Electrochemical tests such as cyclic potentiodynamic curves (CPP) and electrochemical impedance spectroscopy (EIS) were performed in order to characterize the corrosion behavior of steel in chloride contaminated FA synthetic pore solution as well as the carbonation effect. Results showed that FA synthetic pore solution was able to repassivate the steel even with chloride contents of 0.1M NaCl. Furthermore, the combined effect of chloride and carbonation induced corrosion was observed, showing corrosion rates of 3.547 × 10 ‒5 A/cm 2 in FA carbonated pore solution containing 0.6M NaCl.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81082853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Introduction Chitosan (Chit) is a biopolymer which is synthesized by the deacetylation of chitin extracted from the shells of crustaceans. In the past few years, chitosan was widely used in physical and electrochemical research due to its costefficiency, low toxicity and ecofriendly nature [1]. The corrosion inhibition potential of chitosan is due to the amino and hydroxyl groups present in the polymer structure. Chitosan can provide a possible temporary coating on several metal layers [2-3] and the anti-corrosive properties can improve by adding different inhibitors in the chitosan system. Cresol red (CR) is a widely used pH indicator, red below 1 pH, yellow/orange at pH below 7.2 and purple color at pH higher than 8.8. In the pH range between 7.2 and 8.8 is red [4]. This study focuses on the influence of cresol red as a possible corrosion inhibitor for chitosan thin layers on zinc substrates and at the same time a possible indicator of corrosion process starting by color change of the coating.
{"title":"Cresol red as corrosion inhibitor in chitosan thin layers on zinc","authors":"Regina- Henriett Buier, G. Szabó, L. Muresan","doi":"10.3390/cmdwc2021-10043","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10043","url":null,"abstract":"Introduction Chitosan (Chit) is a biopolymer which is synthesized by the deacetylation of chitin extracted from the shells of crustaceans. In the past few years, chitosan was widely used in physical and electrochemical research due to its costefficiency, low toxicity and ecofriendly nature [1]. The corrosion inhibition potential of chitosan is due to the amino and hydroxyl groups present in the polymer structure. Chitosan can provide a possible temporary coating on several metal layers [2-3] and the anti-corrosive properties can improve by adding different inhibitors in the chitosan system. Cresol red (CR) is a widely used pH indicator, red below 1 pH, yellow/orange at pH below 7.2 and purple color at pH higher than 8.8. In the pH range between 7.2 and 8.8 is red [4]. This study focuses on the influence of cresol red as a possible corrosion inhibitor for chitosan thin layers on zinc substrates and at the same time a possible indicator of corrosion process starting by color change of the coating.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90915492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. P. Alferez Luna, Franziska Klünder, S. Gschwander
{"title":"Corrosion resistance of aluminium against salt hydrates used for latent heat storage by using different coating materials","authors":"M. P. Alferez Luna, Franziska Klünder, S. Gschwander","doi":"10.3390/cmdwc2021-10045","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10045","url":null,"abstract":"","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80469779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Pillado, M. Mohedano, R. del Olmo, B. Mingo, E. Matykina, R. Arrabal
: Layered Double Hydroxides (LDHs) coatings were developed for corrosion protection of AZ31 Mg alloy. LDH coatings were fabricated under co-precipitation conditions and applied under hydrothermal conditions. Two different systems Zn-Al LDH and Li-Al LDH were studied. Specimens were post-treated via immersion for 2 h at 45 ºC in Na 2 WO 4 ·H 2 O or LiNO 3 baths respectively, to produce Zn-Al LDH(W) and Li-Al LDH(Li). The characterization of the coatings was carried out by field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The corrosion process was studied by electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). Surface was also evaluated by water drop contact angle and paint adhesion test by using an epoxy primer. The characterization of the coating revealed two-layered coatings with a denser inner layer and a flaky outer layer. Both coatings improved the corrosion resistance of the AZ31 alloy. Loading with inhibitor further increased the corrosion resistance by one order of magnitude (Bare substrate, Z 10mHz ⁓ 102 Ω cm2 ; LDH, Z 10mHz ⁓ 103-4 Ω cm2 ; LDH-inhibitor, Z 10mHz ⁓ 105 Ω cm2 ).
{"title":"Corrosion of AZ31 with LDH conversion coatings loaded with inorganic inhibitors.","authors":"B. Pillado, M. Mohedano, R. del Olmo, B. Mingo, E. Matykina, R. Arrabal","doi":"10.3390/cmdwc2021-10041","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10041","url":null,"abstract":": Layered Double Hydroxides (LDHs) coatings were developed for corrosion protection of AZ31 Mg alloy. LDH coatings were fabricated under co-precipitation conditions and applied under hydrothermal conditions. Two different systems Zn-Al LDH and Li-Al LDH were studied. Specimens were post-treated via immersion for 2 h at 45 ºC in Na 2 WO 4 ·H 2 O or LiNO 3 baths respectively, to produce Zn-Al LDH(W) and Li-Al LDH(Li). The characterization of the coatings was carried out by field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The corrosion process was studied by electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). Surface was also evaluated by water drop contact angle and paint adhesion test by using an epoxy primer. The characterization of the coating revealed two-layered coatings with a denser inner layer and a flaky outer layer. Both coatings improved the corrosion resistance of the AZ31 alloy. Loading with inhibitor further increased the corrosion resistance by one order of magnitude (Bare substrate, Z 10mHz ⁓ 102 Ω cm2 ; LDH, Z 10mHz ⁓ 103-4 Ω cm2 ; LDH-inhibitor, Z 10mHz ⁓ 105 Ω cm2 ).","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87053295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Microencapsulated corrosion inhibitors for controlled release in simulated concrete pore solutions","authors":"D. Bastidas, J. Ress, Ulises Diaz, J. Bosch","doi":"10.3390/cmdwc2021-10037","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10037","url":null,"abstract":"","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84334346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muslum Yunacti, Alexandre Mégret, A. Montagne, V. Vitry
: Electroless nickel-boron (ENB) coatings from borohydride-reduced bath have received wide acceptance thanks to their excellent hardness and superior wear resistance. Therefore, they have been considered as an alternative to hard chrome. However, the presence of a small amount of toxic heavy metals such as Pb or Tl in the plating bath restricts their application. These metallic salts are used to stabilize the bath, which is necessary to avoid abrupt decomposition, and are harmful towards the environment. A new bath, that is exempt from stabilizer, was designed for ENB plating. In this bath, the bath stability is achieved through the optimization of the concentration of complexing agent, pH adjuster, and reducing agent. An ENB coating from the new bath presents promising properties including modified surface morphology, excellent hardness, low friction coefficient, etc. Salt spray test (ASTM B117-07) and potentiodynamic polarization test results showed that the new ENB coating has a significantly better corrosion resistance than the conventional ENB coatings stabilized by Pb or Tl salts. In conclusion, the present ENB coating is produced in an environmentally friendly bath, and the deposit presents properties close to those of the conventional ENB deposit.
{"title":"Corrosion resistance of electroless nickel-boron coating in a bath exempt from stabilizer","authors":"Muslum Yunacti, Alexandre Mégret, A. Montagne, V. Vitry","doi":"10.3390/cmdwc2021-10038","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10038","url":null,"abstract":": Electroless nickel-boron (ENB) coatings from borohydride-reduced bath have received wide acceptance thanks to their excellent hardness and superior wear resistance. Therefore, they have been considered as an alternative to hard chrome. However, the presence of a small amount of toxic heavy metals such as Pb or Tl in the plating bath restricts their application. These metallic salts are used to stabilize the bath, which is necessary to avoid abrupt decomposition, and are harmful towards the environment. A new bath, that is exempt from stabilizer, was designed for ENB plating. In this bath, the bath stability is achieved through the optimization of the concentration of complexing agent, pH adjuster, and reducing agent. An ENB coating from the new bath presents promising properties including modified surface morphology, excellent hardness, low friction coefficient, etc. Salt spray test (ASTM B117-07) and potentiodynamic polarization test results showed that the new ENB coating has a significantly better corrosion resistance than the conventional ENB coatings stabilized by Pb or Tl salts. In conclusion, the present ENB coating is produced in an environmentally friendly bath, and the deposit presents properties close to those of the conventional ENB deposit.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79730985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: The replacement of environmentally harmful chromate coatings has been of great interest to the electrochemical industry. Compact silica coatings are a widely discussed inorganic coating alternative, to replace previously used toxic materials. Silica offers a feasible and simple method of passive corrosion protection, with the option of enhancement by incorporating different inhibitors into the matrix. Tannic acid is a non-toxic substance, that acts as cathodic corrosion inhibitor, by forming metal-tannate protective barriers. [1,2] The present study discusses the addition of different concentrations of tannic acid in nano-scale silica coatings, which were prepared by sol-gel technique and dip-coating method on Zn substrates. Long term corrosion measurements were carried out on the prepared substrates to check their durability and corrosion resistance. The thin layers were characterized by Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization Curves. It has been concluded that silica coatings containing tannic acid show promising EIS values and corrosion current densities, compared to the simple silica coatings. References: [1] E.Kushimerek, E. Chrzescijanska, Mater. Corros., 2015, 66(2), 169-174. [2] B. Qian, B. Han, M. Zheng, Corros. Sci., 2013, 72, 1-9.
摘要:替代对环境有害的铬酸盐涂层一直是电化学行业关注的热点。紧凑的二氧化硅涂料是一种广泛讨论的无机涂料替代品，以取代以前使用的有毒材料。二氧化硅提供了一种可行且简单的被动腐蚀保护方法，可以通过在基体中加入不同的抑制剂来增强。单宁酸是一种无毒物质，通过形成金属-单宁酸保护屏障，起到阴极缓蚀剂的作用。[1,2]本研究讨论了溶胶-凝胶法和浸涂法在锌基上制备纳米二氧化硅涂层时，加入不同浓度的单宁酸。对制备的基材进行了长期腐蚀测量，以检查其耐久性和耐腐蚀性。利用电化学阻抗谱(EIS)和动电位极化曲线对薄膜进行了表征。结果表明，含单宁酸的氧化硅涂层与普通氧化硅涂层相比，具有良好的EIS值和腐蚀电流密度。参考文献:[1]E. kushimerek, E. Chrzescijanska, Mater。Corros。浙江农业学报，2015,66(2)，169-174。[2]钱斌，韩斌，郑明，等。科学。， 2013, 72, 1-9。
{"title":"Investigation of the anti-corrosive effect of tannic acid embedded in silica coatings on Zn substrates","authors":"J. Both, G. Szabó, L. Muresan","doi":"10.3390/cmdwc2021-10035","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10035","url":null,"abstract":"Abstract: The replacement of environmentally harmful chromate coatings has been of great interest to the electrochemical industry. Compact silica coatings are a widely discussed inorganic coating alternative, to replace previously used toxic materials. Silica offers a feasible and simple method of passive corrosion protection, with the option of enhancement by incorporating different inhibitors into the matrix. Tannic acid is a non-toxic substance, that acts as cathodic corrosion inhibitor, by forming metal-tannate protective barriers. [1,2] The present study discusses the addition of different concentrations of tannic acid in nano-scale silica coatings, which were prepared by sol-gel technique and dip-coating method on Zn substrates. Long term corrosion measurements were carried out on the prepared substrates to check their durability and corrosion resistance. The thin layers were characterized by Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization Curves. It has been concluded that silica coatings containing tannic acid show promising EIS values and corrosion current densities, compared to the simple silica coatings. \u0000References: \u0000 [1] E.Kushimerek, E. Chrzescijanska, Mater. Corros., 2015, 66(2), 169-174. \u0000[2] B. Qian, B. Han, M. Zheng, Corros. Sci., 2013, 72, 1-9.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90184467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Mild steel is often used in the construction of reaction vessels, storage tanks, and petroleum refineries, but it is heavily damaged by acid solutions. Despite ongoing developments in the production of corrosion-resistant materials, chemical inhibitors are also the most realistic and cost-effective method of corrosion prevention. Mild steel corrosion has been shown to be inhibited by organic compounds containing nitrogen, sulphur, oxygen, and heterocyclic compounds with a polar functional group and a conjugated double bond. Organic inhibitors come in a variety of forms, but the majority of them are both costly and harmful. As a result, finding low-cost and environmentally sustainable inhibitors remains a priority. A small number of non-toxic compounds from the pharmaceutically active compounds have been studied for their mild steel corrosion inhibition properties in acid media. Plant extracts are abundant in corrosion inhibitors that are safe for the environment. The extracts from the plant are non-toxic and easy to obtain. Many organic compounds with polar atoms like O, N, P, and S can be found in these extracts. Protective films are created as they are adsorbed onto the metal surface by these polar atoms. These ingredients adsorb according to a number of isotherms. By analysing data from weight loss measurements, tafel polarisation, and EIS investigations, we have studied structural features of a few green corrosion inhibitors and their mechanism of corrosion inhibition.
{"title":"Investigation of structural properties and corrosion inhibition mechanism of green corrosion inhibitors for mild steel in acidic media","authors":"S. Khan, Muhammad Hussain, M. Quraishi","doi":"10.3390/cmdwc2021-10032","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10032","url":null,"abstract":": Mild steel is often used in the construction of reaction vessels, storage tanks, and petroleum refineries, but it is heavily damaged by acid solutions. Despite ongoing developments in the production of corrosion-resistant materials, chemical inhibitors are also the most realistic and cost-effective method of corrosion prevention. Mild steel corrosion has been shown to be inhibited by organic compounds containing nitrogen, sulphur, oxygen, and heterocyclic compounds with a polar functional group and a conjugated double bond. Organic inhibitors come in a variety of forms, but the majority of them are both costly and harmful. As a result, finding low-cost and environmentally sustainable inhibitors remains a priority. A small number of non-toxic compounds from the pharmaceutically active compounds have been studied for their mild steel corrosion inhibition properties in acid media. Plant extracts are abundant in corrosion inhibitors that are safe for the environment. The extracts from the plant are non-toxic and easy to obtain. Many organic compounds with polar atoms like O, N, P, and S can be found in these extracts. Protective films are created as they are adsorbed onto the metal surface by these polar atoms. These ingredients adsorb according to a number of isotherms. By analysing data from weight loss measurements, tafel polarisation, and EIS investigations, we have studied structural features of a few green corrosion inhibitors and their mechanism of corrosion inhibition.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75164775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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