表面技术Issue(8)：86-91,129,7.DOI:10.16490/j.cnki.issn.1001-3660.2015.08.016
铝酸钠溶液中Na2 S对Q235钢腐蚀的影响
Effect of Na2 S in Sodium Aluminate Solution on the Corrosion Behavior of Q235 Steel
摘要
Abstract
ABSTRACT:Objective To study the corrosion behavior of Q235 steel in the S2--containing sodium aluminate solution. Methods The production conditions were simulated to prepare the mother liquor. Salt spray corrosion method together with SEM and EDS a-nalysis technology, combined with the corrosion weight loss dynamics equation and polarization curve were used to study the effects of the Na2 S concentration and time on the corrosion behavior of Q235 steel. Results The elements of corrosion products were mainly O, S, Al and Fe. In sodium aluminate solution, the surface of the substrate was covered with a layer of Al2 O3 protective film, which could hinder the penetration of sulfur ions in the solution to the substrate surface, and play a role in the protection of the ma-trix. Therefore, in the early corrosion stage and at low concentrations, the corrosion rate was low, but with the increase of the con-centration and the prolonged corrosion time, the protective membrane was damaged, S2-passed through the protective film and reacted with the substrate, generating sulphide which accelerated the corrosion rate. When the S2-mass concentration increased to 6 g/L and the corrosion time was 9 d, sulfide was oxidized to oxide with a relatively stable structure, the corrosion was inhibited. Conclusion In sodium aluminate solution, S2- concentration and corrosion time had a certain promoting effect of corrosion , but when the corrosion time and S2- concentration reached a certain value, the corrosion rate showed a decreasing trend, the corrosion was inhibited.关键词
铝酸钠溶液/Q235/Na2 S质量浓度/腐蚀时间/腐蚀速率/极化曲线Key words
sodium aluminate solution/Q235/Na2 S concentration/corrosion time/corrosion rate/polarization curve分类
矿业与冶金引用本文复制引用
张曼,陈朝轶,李军旗,赵聪,杨夏琼..铝酸钠溶液中Na2 S对Q235钢腐蚀的影响[J].表面技术,2015,(8):86-91,129,7.基金项目
国家自然科学基金资助项目(51264006,51474079,51464008) （51264006,51474079,51464008）
贵州省教育厅项目(黔教合重大专项字(2012)0002) （黔教合重大专项字(2012）
贵州省校合作项目(LH[2014]7609)Fund：Supported by the National Natural Science Foundation of China (51264006,51474079,51464008), Guizhou Province Education Department Project (Qian Teach us the Special Word (2012)0002) and Guizhou University Cooperation Projects (LH[2014]7609) （LH[2014]7609）
