苯胺-甲醛共聚物的分子结构对其在盐酸溶液中缓蚀碳钢性能的影响。

Effect of molecular structure of aniline-formaldehyde copolymers on corrosion inhibition of mild steel in hydrochloric acid solution.

机构信息

Faculty of Chemistry and Chemical Engineering, Qingdao University, Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles of Shandong Province, 308 Ningxia Road, Qingdao 266071, China.

National Centre for Advanced Tribology at Southampton (nCATS), Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK.

出版信息

J Hazard Mater. 2015 May 30;289:130-139. doi: 10.1016/j.jhazmat.2015.02.036. Epub 2015 Feb 16.

DOI:10.1016/j.jhazmat.2015.02.036

PMID:25723887

Abstract

Aniline-formaldehyde copolymers with different molecular structures have been prepared and investigated for the purpose of corrosion control of mild steel in hydrochloric acid. The copolymers were synthesized by a condensation polymerization process with different ratios of aniline to formaldehyde in acidic precursor solutions. The corrosion inhibition efficiency of as-synthesized copolymers for Q235 mild steel was investigated in 1.0 mol L(-1) hydrochloric acid solution by weight loss measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy, respectively. All the results demonstrate that as-prepared aniline-formaldehyde copolymers are efficient mixed-type corrosion inhibitors for mild steels in hydrochloric acid. The corrosion inhibition mechanism is discussed in terms of the role of molecular structure on adsorption of the copolymers onto the steel surface in acid solution.

摘要

已经制备了具有不同分子结构的苯胺-甲醛共聚物，并研究了它们在盐酸中控制低碳钢腐蚀的用途。通过在酸性前体溶液中不同苯胺与甲醛的比例的缩聚聚合过程合成了共聚物。通过重量损失测量、动电位极化和电化学阻抗谱分别研究了合成共聚物在 1.0 mol L(-1)盐酸溶液中对 Q235 低碳钢的缓蚀效率。所有结果表明，所制备的苯胺-甲醛共聚物是盐酸中低碳钢的有效混合型缓蚀剂。根据分子结构在酸溶液中吸附共聚物到钢表面的作用讨论了腐蚀抑制机理。