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Peningkatan perencat kakisan menggunakan tanin tertulen dalam medium HCL
Pub Date : 2018-12-01 DOI: 10.17576/MJAS-2018-2206-02
Hatika Kaco, A. N. Atiqah, Sarani Zakaria, Sharifah Nabihah, Norinsan Kamil Othman, Chia ChinHua, Gan SinYee
Tannin was successfully extracted from Gelam bark using acetone as the solvent as natural alternatives. The extracted tannin was then used as corrosion inhibitor for mild steel under acidic medium. The gravimetric and electrochemical potentiodynamic corrosion tests were executed at different purified and unpurified tannin concentrations (200-800 ppm) to test the ability to inhibit mild steel corrosion. The results showed that the corrosion rate decreased as tannin concentration increased while the inhibition efficiency increased. The isotherm adsorption found that the Langmuir model was the best model to represent the interaction of tannin inhibitor and the active sites on mild steel surface. The SEM analysis showed that the mild steel morphology changed after the addition of tannin. The presence of blue-black color on the mild steel surface indicated the formation of ferric tannate to protect the surface of mild steel. In conclusion, purified tannin was a better inhibitor compared to unpurified tannin on mild steel in 1 M HCl.
以丙酮为天然溶剂,成功地从明胶树皮中提取单宁。提取的单宁酸在酸性介质中用作低碳钢的缓蚀剂。在不同纯化和未纯化单宁浓度(200-800 ppm)下进行了重量和电化学动电位腐蚀试验,以测试其抑制低碳钢腐蚀的能力。结果表明,随着单宁浓度的增加,腐蚀速率降低,缓蚀效率提高。等温吸附实验发现,Langmuir模型是表征单宁抑制剂与低碳钢表面活性位点相互作用的最佳模型。SEM分析表明,加入单宁后,低碳钢的形貌发生了变化。低碳钢表面呈现蓝黑色,表明单宁酸铁的形成起到了保护低碳钢表面的作用。综上所述,在1 M盐酸溶液中,纯化单宁比未纯化单宁对低碳钢具有更好的抑制作用。
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引用次数: 5
Pengoptimuman asid didopkan membran elektrolit polibenzimidazol untuk sel bahan api PEM suhu tinggi)
Pub Date : 2018-12-01 DOI: 10.17576/MJAS-2018-2206-17
Ahsanul Haque, Abu Bakar Sulong, Edy Herianto, Kee Shyuan Loh, Teuku Husaini, R. Rosli
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引用次数: 0
Adunan polimer polietilena linear berketumpatan rendah, getah asli dan polianilina: Sifat regangan dan kestabilan terma
Pub Date : 2018-12-01 DOI: 10.17576/MJAS-2018-2206-09
Farrah Diyana Zailan, Ruey Shan Chen, Sahrim Ahmad, Dalila Shahdan, A. M. Ali, Mohd Izzat Fahmi Mohd Ruf
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引用次数: 0
Modifikasi larut lesap bagi 238 u dan 232 th dari residu pemurnian larut lesap air (WLP)) 自定义插件238 u和232的溶解溶性溶液残渣(WLP)
Pub Date : 2018-12-01 DOI: 10.17576/MJAS-2018-2206-06
N. Rashid, Zetty Izzaty Saleh, Nurul Syiffa Mahzan, Siti Nur Ain Sulaiman, Khoo Kok Siong Kok Siong, Mohd Idzat Idris, Syazwani Mohd Fadzil
{"title":"Modifikasi larut lesap bagi 238 u dan 232 th dari residu pemurnian larut lesap air (WLP))","authors":"N. Rashid, Zetty Izzaty Saleh, Nurul Syiffa Mahzan, Siti Nur Ain Sulaiman, Khoo Kok Siong Kok Siong, Mohd Idzat Idris, Syazwani Mohd Fadzil","doi":"10.17576/MJAS-2018-2206-06","DOIUrl":"https://doi.org/10.17576/MJAS-2018-2206-06","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"17 1","pages":"965-972"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87148080","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}
引用次数: 0
Kesan saiz serat terhadap biokomposit sansevieria trifasciata/getah asli/polietilena berketumpatan tinggi
Pub Date : 2018-12-01 DOI: 10.17576/MJAS-2018-2206-16
N. Zakaria, I. Ahmad, W. Mohamad
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引用次数: 0
Membran poliuretana sebagai penjerap untuk pewarna metil oren dan etil ungu lembayung
Pub Date : 2018-12-01 DOI: 10.17576/MJAS-2018-2206-14
Khairiah Haji Badri, Fatem Hamimie Ismail, Amira Shakim Abdul Shakir, Sharifah Mohamad, Hawa Aqilah Hamuzan, Nur Syakilla Hassan
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引用次数: 1
Sifat swapenyusunan galaktosida berasaskan minyak sawit
Pub Date : 2018-04-01 DOI: 10.17576/MJAS-2018-2202-21
Y. Marina, N. Aripin, Nurfatin Inani Aznan, R. Salleh
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引用次数: 0
Pengesanan asid lemak metil ester dalam sterculiaceae
Pub Date : 2018-04-01 DOI: 10.17576/MJAS-2018-2202-24
Samsul Fathin Nurizati, Ibtisam Abdul Wahab, Hannis Fadzillah Mohsin
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引用次数: 0
Sebuah ulasan terhadap pelarut pengekstrakan dalam pengekstrakan mikro cecair-cecair serakan
Pub Date : 2018-04-01 DOI: 10.17576/MJAS-2018-2202-01
Yeong Hwang Tan, Mee Kin Chai, Ling Shing Wong
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引用次数: 10
Ciri-ciri gabungan biochar dari sekam padi dengan abu terbang arang batu sebagai potensi bahan penjerab
Pub Date : 2018-04-01 DOI: 10.17576/MJAS-2018-2202-19
Ahmad Nurul Farhana, Azil Bahari Alias, Norhayati Talib, Zulkifli Abd Rashid, Wan Azlina Wan Ab Karim Ghani
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引用次数: 2
期刊
The Malaysian Journal of Analytical Sciences
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