Pub Date : 2015-10-22DOI: 10.11903/1002.6495.2014.376
X. Yao, C. Cai, Jin-feng Li, L. Song, Dan-yang Liu
Galvanic corrosion performance of 5383 Al alloy coupled with 907 steel and aluminum bronze respectively in the early stage was studied by galvanic current test and scanning electron microscopy(SEM). The results showed that the 5383 Al alloy acted as anodes for the two galvanic couples, while 907 steel and aluminum bronze were cathode. The corrosion morphology of 5383 Al alloy could be metastable pitting, irregular stable pitting and filiform- like corrosion. The galvanic current density Igof two couples varied similarly with immersion time, they decreased at the beginning and then became stable. The galvanic current density decreased with the increase of distance from the couple joint, and it became uniform in the far end. Compared with the couple 5383 Al alloy/aluminum bronze, the galvanic corrosion for couple 5383 Al alloy/907 steel was less severe,but it was more concentrated with in an area of 2 mm nearby the joint line.
{"title":"Early Stage Galvanic Corrosion of 5383 Al Alloy Coupled with 907 Steel and Aluminum Bronze in 3.5%NaCl Solution","authors":"X. Yao, C. Cai, Jin-feng Li, L. Song, Dan-yang Liu","doi":"10.11903/1002.6495.2014.376","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.376","url":null,"abstract":"Galvanic corrosion performance of 5383 Al alloy coupled with 907 steel and aluminum bronze respectively in the early stage was studied by galvanic current test and scanning electron microscopy(SEM). The results showed that the 5383 Al alloy acted as anodes for the two galvanic couples, while 907 steel and aluminum bronze were cathode. The corrosion morphology of 5383 Al alloy could be metastable pitting, irregular stable pitting and filiform- like corrosion. The galvanic current density Igof two couples varied similarly with immersion time, they decreased at the beginning and then became stable. The galvanic current density decreased with the increase of distance from the couple joint, and it became uniform in the far end. Compared with the couple 5383 Al alloy/aluminum bronze, the galvanic corrosion for couple 5383 Al alloy/907 steel was less severe,but it was more concentrated with in an area of 2 mm nearby the joint line.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313538","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}
Pub Date : 2015-09-10DOI: 10.11903/1002.6495.2014.281
孙彦伟, 陈吉
X80 pipeline steel was nitridated by plasma nitriding and then its electrochemical corrosion behavior in 3.5% NaCl solution was studied by means of polarization curves and impedance spectroscopy. As compared to the bare X80 steel, the nitriding steels exhibit a remarkable increment in hardness, which increases with the rising nitriding temperature; the nitriding steels possess higher corrosion resistance with a lower corrosion current density by about one order of magnitude.The formation of e phase(Fe3N) with a small amount of γ ' phase(Fe4N) dominates on the surface of the steel nitridated at 450 ℃, resulting in a maximium in corrosion potential about-214 m V and a minimum in corrosion current density about 0.56 μA/cm2, respectively, togeter with the hardness increase to about 810 HV. Only the γ 'phase forms on the surface of the steel nitridated at 570 ℃,which contributes to the hardness increase to 930 HV and a obvious decrease of corrosion resistance. The plasma nitriding temperature determines the phase constitutes of the surface nitriding layer and affects greatly its hardness and corrosion resistance.
采用等离子体渗氮对X80管线钢进行氮化处理，并利用极化曲线和阻抗谱研究了X80管线钢在3.5% NaCl溶液中的电化学腐蚀行为。与裸X80钢相比，随着渗氮温度的升高，渗氮钢的硬度显著增加;氮化钢在腐蚀电流密度降低约一个数量级的情况下具有较高的耐蚀性。450℃氮化钢表面主要形成e相(Fe3N)和少量γ′相(Fe4N)，最大腐蚀电位约为-214 m V，最小腐蚀电流密度约为0.56 μA/cm2，硬度提高到810 HV左右。570℃氮化钢表面仅形成γ′相，硬度提高到930 HV，耐蚀性能明显下降。等离子体渗氮温度决定了表面渗氮层的相组成，对渗氮层的硬度和耐蚀性有很大影响。
{"title":"Effect of Plasma Nitriding Temperature on Corrosion Resistance of Nitriding Layer on X80 Pipeline Steel in 3.5%NaCl Solution","authors":"孙彦伟, 陈吉","doi":"10.11903/1002.6495.2014.281","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.281","url":null,"abstract":"X80 pipeline steel was nitridated by plasma nitriding and then its electrochemical corrosion behavior in 3.5% NaCl solution was studied by means of polarization curves and impedance spectroscopy. As compared to the bare X80 steel, the nitriding steels exhibit a remarkable increment in hardness, which increases with the rising nitriding temperature; the nitriding steels possess higher corrosion resistance with a lower corrosion current density by about one order of magnitude.The formation of e phase(Fe3N) with a small amount of γ ' phase(Fe4N) dominates on the surface of the steel nitridated at 450 ℃, resulting in a maximium in corrosion potential about-214 m V and a minimum in corrosion current density about 0.56 μA/cm2, respectively, togeter with the hardness increase to about 810 HV. Only the γ 'phase forms on the surface of the steel nitridated at 570 ℃,which contributes to the hardness increase to 930 HV and a obvious decrease of corrosion resistance. The plasma nitriding temperature determines the phase constitutes of the surface nitriding layer and affects greatly its hardness and corrosion resistance.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313420","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}
Pub Date : 2015-09-10DOI: 10.11903/1002.6495.2014.297
苏小红, 孔小东, 王楷, 胡裕龙
The corrosion inhibition effect of several inhibitors on a galvanic couple of 907 steelZL102 Al alloy in 3%NaCl solution was investigated by using electrochemical tests and mass-loss experiment. The inhibitors include 0.1 mg/g Na2 S, 1%Na3PO4and 5000 mg/L Na2MoO4 as well as their compounds of 0.1 mg/g Na2S + 1% Na3PO4 and 1% Na3PO4+ 5000 mg/L Na2MoO4. The results showed that, all the inhibitors can reduce the galvanic corrosion of 907 steel-ZL102 Al alloy coupling to a certain extent, and slow the corrosion of steel and aluminum in 3%Na Cl solution; among others the integrated inhibition effect of the compound 1% Na3PO4+5000 mg/L Na2MoO4 is the best for the 907 steel-ZL102 Al alloy coupling.
{"title":"几种缓蚀剂对钢-铝偶合体在3%NaCl溶液中的缓蚀作用研究","authors":"苏小红, 孔小东, 王楷, 胡裕龙","doi":"10.11903/1002.6495.2014.297","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.297","url":null,"abstract":"The corrosion inhibition effect of several inhibitors on a galvanic couple of 907 steelZL102 Al alloy in 3%NaCl solution was investigated by using electrochemical tests and mass-loss experiment. The inhibitors include 0.1 mg/g Na2 S, 1%Na3PO4and 5000 mg/L Na2MoO4 as well as their compounds of 0.1 mg/g Na2S + 1% Na3PO4 and 1% Na3PO4+ 5000 mg/L Na2MoO4. The results showed that, all the inhibitors can reduce the galvanic corrosion of 907 steel-ZL102 Al alloy coupling to a certain extent, and slow the corrosion of steel and aluminum in 3%Na Cl solution; among others the integrated inhibition effect of the compound 1% Na3PO4+5000 mg/L Na2MoO4 is the best for the 907 steel-ZL102 Al alloy coupling.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313427","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}
Pub Date : 2015-04-17DOI: 10.11903/1002.6495.2014.146
Jian Li, H. Su, A. Yan, F. Chai, Xiao-ping Chen, Hui-min Meng, Xiang-yang Li
The corrosion behavior of a commercial carbon steel Q235, and two new steels A1 and A2 in an artificial soil, which consisted of diatomite and appropriate acid solution to simulate a typical acidic soil at Southern China was studied by mean of corrosion weight loss measurement, and then the corrosion morphology and products were characterized by SEM and XRD. The results showed that the corrosion rate of Q235, A1 and A2 steel in the simulated acidic soil was 0.48, 0.14 and 0.097 mm/a respectively after 300 h corrosion; the tendency to micro-cell corrosion of a steel can be lowered as the carbon content of the steel has been reduced; an appropriate addition of Cr can shift positively the corrosion potential of the matrix; the enrichment of Cr in the inner portion of the rust scale can improve its compactness, and change the propagation mode of corrosion pits;the corrosion products of Q235, A1 and A2 steel were mainly consisted of α- Fe OOH, γ- Fe OOH and Fe3O4, however, the corrosion products of A1 and A2 steels possess a ratio of α-Fe OOH to γ-Fe OOH ca 10 times higher than that of Q235 steel, which implying a better protectiveness of the rust layers for the two new steels.
{"title":"Research of Acid Soil Corrosion Resistant New Steels for Grounding Grid","authors":"Jian Li, H. Su, A. Yan, F. Chai, Xiao-ping Chen, Hui-min Meng, Xiang-yang Li","doi":"10.11903/1002.6495.2014.146","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.146","url":null,"abstract":"The corrosion behavior of a commercial carbon steel Q235, and two new steels A1 and A2 in an artificial soil, which consisted of diatomite and appropriate acid solution to simulate a typical acidic soil at Southern China was studied by mean of corrosion weight loss measurement, and then the corrosion morphology and products were characterized by SEM and XRD. The results showed that the corrosion rate of Q235, A1 and A2 steel in the simulated acidic soil was 0.48, 0.14 and 0.097 mm/a respectively after 300 h corrosion; the tendency to micro-cell corrosion of a steel can be lowered as the carbon content of the steel has been reduced; an appropriate addition of Cr can shift positively the corrosion potential of the matrix; the enrichment of Cr in the inner portion of the rust scale can improve its compactness, and change the propagation mode of corrosion pits;the corrosion products of Q235, A1 and A2 steel were mainly consisted of α- Fe OOH, γ- Fe OOH and Fe3O4, however, the corrosion products of A1 and A2 steels possess a ratio of α-Fe OOH to γ-Fe OOH ca 10 times higher than that of Q235 steel, which implying a better protectiveness of the rust layers for the two new steels.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313409","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}
Pub Date : 2015-04-17DOI: 10.11903/1002.6495.2014.326
Yajun Zhang, Siwei Li, Ping Xu, Liping Lu, Lihua Sun
The effect of the initial dose of NaClO on the bacteriostasis of iron bacteria and the corrosion behavior of the pipeline steel for water distribution network was studied in an urban reclaimed water, which was sampled from a water recycle work in North China. Results show that the iron bacteria can be effectively inhibited by the addition of NaClO; the higher the dose is the longer time needs for the resurrection of the iron bacteria, therefore the better bacteriostasis may be realized; the existence of iron bacteria can significantly promote the corrosion of carbon steel,but with the extension of time, the corrosion of the steel may be suppressed to certain extent due to the formation of biofilms on the steel surface; in fact the addition of NaClO in the initial stage can suppress the corrosion of carbon steel induced by iron bacteria, however NaClO itself is also a corrosive medium to the steel, thus in the meanwhile a higher initial dose of NaClO may enhance the corrosion rate of the steel. Finally an optimal dose of NaClO 7 mg/L is acquired in terms of a compromise between the bacteriostasis in the reclaim water and the corrosion control of the steel.
{"title":"Effect of NaClO Addition on Bacteriostasis of Iron Bacteria and Corrosion Control of Pipe Line Steel for Water Distribution Network in Urban Reclaimed Water","authors":"Yajun Zhang, Siwei Li, Ping Xu, Liping Lu, Lihua Sun","doi":"10.11903/1002.6495.2014.326","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.326","url":null,"abstract":"The effect of the initial dose of NaClO on the bacteriostasis of iron bacteria and the corrosion behavior of the pipeline steel for water distribution network was studied in an urban reclaimed water, which was sampled from a water recycle work in North China. Results show that the iron bacteria can be effectively inhibited by the addition of NaClO; the higher the dose is the longer time needs for the resurrection of the iron bacteria, therefore the better bacteriostasis may be realized; the existence of iron bacteria can significantly promote the corrosion of carbon steel,but with the extension of time, the corrosion of the steel may be suppressed to certain extent due to the formation of biofilms on the steel surface; in fact the addition of NaClO in the initial stage can suppress the corrosion of carbon steel induced by iron bacteria, however NaClO itself is also a corrosive medium to the steel, thus in the meanwhile a higher initial dose of NaClO may enhance the corrosion rate of the steel. Finally an optimal dose of NaClO 7 mg/L is acquired in terms of a compromise between the bacteriostasis in the reclaim water and the corrosion control of the steel.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313518","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}
Pub Date : 2015-02-14DOI: 10.11903/1002.6495.2014.057
Yujing Fan, Y. Zuo, Xuhui Zhao, Yuming Tang
A corrosion resistant coating for AZ91 D magnesium alloy was prepared by adding pure magnesium particles, aluminium triphosphate(SAP) and ceria in an epoxy coating. The performance of the coating in 3%Na Cl solution was studied with methods of Machu test, electrochemical impedance measurement and scanning electron microscope. The results show that the Mg-rich epoxy coating failed and the magnesium substrate was corroded after immersion for about 2000 h,while no corrosion was observed beneath the coating with SAP and ceria addition after immersion for 4448 h. Distinctly the added SAP and ceria can decrease the activity of magnesium particles in the Mg-rich epoxy and thereby prolong the life time of the coating. On the other hand, the compactness and the barrier property of the coating are improved as well.
{"title":"Performance of Aluminum Triphosphate and Ceria Modified Mg-rich Epoxy Coating on AZ91D Magnesium Alloy","authors":"Yujing Fan, Y. Zuo, Xuhui Zhao, Yuming Tang","doi":"10.11903/1002.6495.2014.057","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.057","url":null,"abstract":"A corrosion resistant coating for AZ91 D magnesium alloy was prepared by adding pure magnesium particles, aluminium triphosphate(SAP) and ceria in an epoxy coating. The performance of the coating in 3%Na Cl solution was studied with methods of Machu test, electrochemical impedance measurement and scanning electron microscope. The results show that the Mg-rich epoxy coating failed and the magnesium substrate was corroded after immersion for about 2000 h,while no corrosion was observed beneath the coating with SAP and ceria addition after immersion for 4448 h. Distinctly the added SAP and ceria can decrease the activity of magnesium particles in the Mg-rich epoxy and thereby prolong the life time of the coating. On the other hand, the compactness and the barrier property of the coating are improved as well.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313375","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}
Pub Date : 2015-01-01DOI: 10.11903/1002.6495.2014.328
N. Han, B. Liu, Tao Zhang, Zhongyi Wang, G. Meng, Y. Shao
{"title":"Corrosion Failure Analysis of a Tee in a Natural Gas Field","authors":"N. Han, B. Liu, Tao Zhang, Zhongyi Wang, G. Meng, Y. Shao","doi":"10.11903/1002.6495.2014.328","DOIUrl":"https://doi.org/10.11903/1002.6495.2014.328","url":null,"abstract":"","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313529","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}
Pub Date : 2014-12-03DOI: 10.11903/1002.6495.2013.347
Ke Yang, L. Song, Yong-lai Chen, Xu-hu Zhang, C. Cai, Jinfeng Li
The influence of post-sealing treatment on corrosion behavior of anodized 2195 Al-Li alloys was studied by potentiodynamic polarization, Electrochemical Impedance Spectroscopy(EIS),salt spray test and immersion test in solution of phosphoric acid/chromic acid. The anodic films were post- treated with boiling water, potassium dichromate, nickel sulfate and cerium nitrate, respectively. The results show that the post- sealing can greatly enhance the corrosion resistance of the anodized 2195 Al- Li alloy. The corrosion resistance of the anodic oxide film after post- treatment with cerium nitrate is far better than that with boiling water, but slightly inferior to those with potassium dichromate and nickel sulfate. Finally long term spray test results reveal that the anodized 2195 Al-Li alloy after sealing treatment with potassium dichromate exhibits the highest corrosion resistance among the four post-sealing treatments.
{"title":"Corrosion Behavior of Anodized 2195 Al-Li Alloys with Different Sealing Methods","authors":"Ke Yang, L. Song, Yong-lai Chen, Xu-hu Zhang, C. Cai, Jinfeng Li","doi":"10.11903/1002.6495.2013.347","DOIUrl":"https://doi.org/10.11903/1002.6495.2013.347","url":null,"abstract":"The influence of post-sealing treatment on corrosion behavior of anodized 2195 Al-Li alloys was studied by potentiodynamic polarization, Electrochemical Impedance Spectroscopy(EIS),salt spray test and immersion test in solution of phosphoric acid/chromic acid. The anodic films were post- treated with boiling water, potassium dichromate, nickel sulfate and cerium nitrate, respectively. The results show that the post- sealing can greatly enhance the corrosion resistance of the anodized 2195 Al- Li alloy. The corrosion resistance of the anodic oxide film after post- treatment with cerium nitrate is far better than that with boiling water, but slightly inferior to those with potassium dichromate and nickel sulfate. Finally long term spray test results reveal that the anodized 2195 Al-Li alloy after sealing treatment with potassium dichromate exhibits the highest corrosion resistance among the four post-sealing treatments.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313366","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}
Pub Date : 2014-10-16DOI: 10.11903/1002.6495.2013.277
Huiyan Li, Yue Fang, K. Xiao, Chunyun Guo, C. Dong, L. Xiaogang
The corrosion behavior and the relevant mechanism of carbon steels Q235 and Q450 exposed for 1 a in the hot and dry atmosphere environment at Turpan area was studied by weight lose test,scanning electron microscopy(SEM),energy dispersive spectra(EDS),X-ray diffraction(XRD) and stereological microscope.The results showed that the corrosion rate of carbon steel Q235 was greater than carbon steel Q450.The corrosion products on the surface of the carbon steels were consisted of α-FeOOH,γ-FeOOH and Fe3O4.The corrosion product of carbon steel Q235 was relatively loose for its rather low ratio of γ-FeOOH to α-FeOOH,whilst the corrosion product of carbon steel Q450 was dense for its higher ratio of γ-FeOOH to α-FeOOH.After removal of corrosion products,it could be observed that the depth and volume of corrosion pits of carbon steel Q235 was larger than those of carbon steel Q450.
{"title":"Corrosion Behavior of Carbon Steels in Hot and Dry Atmosphere Environment at Turpan Area","authors":"Huiyan Li, Yue Fang, K. Xiao, Chunyun Guo, C. Dong, L. Xiaogang","doi":"10.11903/1002.6495.2013.277","DOIUrl":"https://doi.org/10.11903/1002.6495.2013.277","url":null,"abstract":"The corrosion behavior and the relevant mechanism of carbon steels Q235 and Q450 exposed for 1 a in the hot and dry atmosphere environment at Turpan area was studied by weight lose test,scanning electron microscopy(SEM),energy dispersive spectra(EDS),X-ray diffraction(XRD) and stereological microscope.The results showed that the corrosion rate of carbon steel Q235 was greater than carbon steel Q450.The corrosion products on the surface of the carbon steels were consisted of α-FeOOH,γ-FeOOH and Fe3O4.The corrosion product of carbon steel Q235 was relatively loose for its rather low ratio of γ-FeOOH to α-FeOOH,whilst the corrosion product of carbon steel Q450 was dense for its higher ratio of γ-FeOOH to α-FeOOH.After removal of corrosion products,it could be observed that the depth and volume of corrosion pits of carbon steel Q235 was larger than those of carbon steel Q450.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313740","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}
Pub Date : 2014-10-16DOI: 10.11903/1002.6495.2013.321
S. Cao, Yang Zhao, P. Liang, Yanhua Shi, Mingli Li, Dan Liu, J. Gui, Feng Liu
The corrosion behavior of Q235 steel in three proton acid ionic liquids with different cations,i.e.3-methyl-l-(4-sulfonic acid) butyl imidazolium hydrogen sulfate [(CH2)4SO3HMIm][HSO4](IL1),N-(4-sulfonic acid) butylpyridinium hydrogen sulfate [(CH2)4SO3HPy][HSO4](IL2) and N-(4-sulfonic acid) butyl triethylammonium hydrogen sulfate) [(CH2)4SO3HTEA][HSO4](IL3) were studied.The surface morphology and compositions of the corrosion products were examined by scanning electron microscopy(SEM).The results revealed that the Q235 steel exhibited rather good resistance to these liquids and its corrosion rates increased with the increasing temperature.Corrosion resistance of Q235 steel in the three ionic liquids decreases according to an order as follows:IL3IL23IL1,and finally the electrochemical corrosion mechanism is also proposed.
{"title":"Influence of Three Proton Acid Ionic Liquids on Corrosion Behavior of Q235 Steel","authors":"S. Cao, Yang Zhao, P. Liang, Yanhua Shi, Mingli Li, Dan Liu, J. Gui, Feng Liu","doi":"10.11903/1002.6495.2013.321","DOIUrl":"https://doi.org/10.11903/1002.6495.2013.321","url":null,"abstract":"The corrosion behavior of Q235 steel in three proton acid ionic liquids with different cations,i.e.3-methyl-l-(4-sulfonic acid) butyl imidazolium hydrogen sulfate [(CH2)4SO3HMIm][HSO4](IL1),N-(4-sulfonic acid) butylpyridinium hydrogen sulfate [(CH2)4SO3HPy][HSO4](IL2) and N-(4-sulfonic acid) butyl triethylammonium hydrogen sulfate) [(CH2)4SO3HTEA][HSO4](IL3) were studied.The surface morphology and compositions of the corrosion products were examined by scanning electron microscopy(SEM).The results revealed that the Q235 steel exhibited rather good resistance to these liquids and its corrosion rates increased with the increasing temperature.Corrosion resistance of Q235 steel in the three ionic liquids decreases according to an order as follows:IL3IL23IL1,and finally the electrochemical corrosion mechanism is also proposed.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66313800","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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