Surface Modification of Mild Steel with Thermally Cured Antibacterial Poly(vinylbenzyl chloride)鈥揚olyaniline Bilayers for Effective Protection against Sulfate Reducing Bacteria Induced Corrosion

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• 作者：Li Lv ; Shaojun Yuan ; Yu Zheng ; Bin Liang ; Simo O. Pehkonen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：August 6, 2014
• 年：2014
• 卷：53
• 期：31
• 页码：12363-12378
• 全文大小：900K
• ISSN：1520-5045

文摘

With the objective of developing anticorrosive conductive polymeric coatings to combat microbially induced corrosion (MIC), a facile and green synthesis approach based on a thermally induced reaction was described. Thermal curing of polyaniline (PANI) was carried out from the silanized mild steel (MS) surface containing reactive epoxy groups, followed by thermally induced N-alkylation of PANI by hydrophobic 4-vinylbenzyl chloride (VBzCl) to produce biocidal functionality. The so-synthesized MS coupons with hydrophobic poly(vinylbenzyl chloride) (PVBC)鈥搎uaternized PANI bilayer coatings were investigated for their anticorrosive and antibacterial properties toward biocorrosion induced by sulfate-reducing bacteria (SRB). Antibacterial assay results revealed an evident decrease in the bacterial attachment and the formation of biofilm. The QPANI鈥揚VBC bilayer coatings showed a high corrosion resistance (inhibition efficiency >97%) and stability to resist SRB-induced corrosion. Thus, the QPANI鈥揚VBC bilayer coated MS substrates can be used as effective polymeric coatings to protect the steel-based equipment in corrosive marine environments.