【作者】 郑俊涛； 潘莹； 郑鹏华； 张三平；

【机构】 武汉材料保护研究所；

【摘要】 金属在海洋中的腐蚀受Cl~-浓度和溶液中溶解氧含量的影响,以往研究多为低Cl~-浓度条件下的腐蚀,对于高Cl~-浓度及与溶解氧含量相关的研究较少。为此,本文采用动电位扫描法和电化学阻抗谱(EIS)方法,对比研究船用903钢在不同浓度NaCl溶液及薄液膜中的腐蚀规律,研究了Cl~-浓度变化过程中溶解氧含量对903钢腐蚀的影响。结果表明,903钢在NaCl溶液及薄液膜中的腐蚀规律不同,初期,随Cl~-浓度升高,溶液中的腐蚀速率先升高后降低,而在薄液膜中腐蚀速率一直升高;相同Cl~-浓度下,薄液膜中溶解氧含量高于溶液中的溶解氧含量,因而其腐蚀速率比溶液中的高。腐蚀规律不同的主要原因是溶解氧含量的不同。更多还原

【Abstract】 The corrosion behaviors of 903 steel in NaCl solution and thin film electrolytes were studied by potensiodynamic polarization and EIS,to study dissolved oxygen content on the 903 steel corrosion.The results showed that the corrosion behaviors of 903 steel in NaCl solution and thin film electrolytes were different.At early stages,along with the increasing content of NaCl,the corrosion rate increased to a peak and then decreased in solution,but in thin film electrolytes,the corrosion rate increased with NaCl increased.The,corrosion in thin film electrolytes was much higher than in solution.Dissolved oxygen content difference was the main reason for the difference of the corrosion behaviors.更多还原