碳钢在含氯离子环境中腐蚀机理的研究.pdfVIP

第28卷 第 1 期 腐蚀与防护 Vol. 28 No. 1 2007 年 1 月 CORROSION PROTECTION January 2007 1, 2 3 1 , , ( 1. 河北师范大学化学与材料科学学院, 石家庄 050016; 2. 河北医科大学 基础医学院, 石家庄 050017; 3. 鞍山市西部第二污水处理厂, 鞍山 114011) : 通 对碳钢在3%NaCl 溶液中进行50h 浸渍干湿复合循环试验的锈层进行IR、XRD 和 SEM 分析, 确定 腐蚀产物包括C2FeOOH 、A2FeOOH、Fe O 和少量B2FeOOH 。并提出C2FeOOH 和有保护能力的A2FeOOH 是由 3 4 FeOH 吸附在 Fe H O # 4H O 表面促使其溶解并转化而来;B2FeOOH 和 Fe O 都是由绿锈转化而来, B2FeOOH 5 8 2 3 4 还可自动转化成大颗粒A2FeOOH, 它们都与高速度腐蚀有关。 : 碳钢; 加速腐蚀; 海洋大气; 机理 : TG172. 5 : A : 10052 748X(2007)012 00172 03 CORROSION MECHANISM OF CARBON STEEL IN CHLORIDE SOLUTION 1,2 3 1 CHEN Hui2ling , LI Xiao2juan , WEI Yu ( 1. College of Chemistry and Materials, Hebei Normal University, Shijiazhuang 050016, China; 2. College of Fundamental Medicine, Hebei Medical U niversity, Shijiazhuang 050017, China; 3. The Second West Anshan Sewage Plant , Anshan 114011, China) Abstract: An accelerated corrosion t est of immersion2 dry2wet combined cycles for carbon steel in 3%NaCl solution for 50h was performed. The corrosion products were analyzed by meas of IR, XRD and SEM . The corrosion products were composed of C2FeOOH , A2FeOOH, Fe O and a little B2FeOOH . The C2FeOOH and A2FeOOH were 3 4 formed due to the transformat ion from Ferrihydrite( Fe HO # 4H O) which dissolved by FeOH . B2FeOOH and