摘要
对碳钢在1.0mmol/L NaHSO3和1.0mmol/L Na2SO4溶液中分别进行周期浸润复合加速腐蚀试验,对其锈层进行红外光谱(IR)和扫描电镜(SEM)分析。各锈层物相组成相似,都含有-γFeOOH、-αFeOOH、Fe3O4和δ-FeOOH或FeSO4.7H2O。NaHSO3溶液中生成的锈层较疏松,颗粒较大,腐蚀速度较快;Na2SO4溶液中生成的锈层致密,腐蚀速度较低。并用Ferrihydrite对形成-γFeOOH和-αFeOOH的促进作用解释了试验结果。
Accelerated corrosion tests of immersion-dry-wet combined cycles in 1.0mmol/L NaHSO3 solution and 1.0mmol/L Na2SO4 solution respectively were performed. Corrosion products were analyzed by IR and SEM. The rusts were composed of γ-FeOOH, α-FeOOH, Fe2O4 and δ-FeOOH or FeSO4 · 7H2O. However the rust layer formed NaHSO3 was loose and corrosion rate was fast, while the rust layer formed in Na2SO4 was dense and corrosion rate was slow. Ferrihydrite had an accelerated action in fomaing γ-FeOOH and αFeOOH.
出处
《腐蚀与防护》
CAS
北大核心
2006年第10期496-498,共3页
Corrosion & Protection
关键词
碳钢
加速腐蚀试验
工业大气
促进作用
Carbon steel
Accelerated corrosion
Industrial atmospheret Accelerated action
