| 含Cl^-溶液中SO4^2-对316不锈钢临界点蚀温度的影响 |
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| 引用本文： | 廖家兴 蒋益明 吴玮巍 钟澄 李劲 宋洪伟. 含Cl^-溶液中SO4^2-对316不锈钢临界点蚀温度的影响[J]. 金属学报, 2006, 42(11): 1187-1190 |
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| 作者姓名： | 廖家兴 蒋益明 吴玮巍 钟澄 李劲 宋洪伟 |
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| 作者单位： | [1]复旦大学材料科学系,上海200433 [2]宝山钢铁股份有限公司技术中心,上海201900 |
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| 基金项目： | 国家自然科学基金项目50571027和上海市科委纳米专项基金项目0452nm004资助 |
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| 摘 要： | 采用外加恒电位下腐蚀电流-温度扫描方法研究了在0．5％Cl^-溶液中，SO4^2-浓度对316不锈钢点腐蚀行为的影响．结果表明，随着SO4^2-浓度的增加，钝化电流增加，开路电位降低．当SO4^2-浓度低于0．42％时，316不锈钢的临界点蚀温度比不存在SO4^2-时的临界点蚀温度低；当SO4^2-浓度大于0．42％时，临界点蚀温度比不存在SO4^2-时的临界点蚀温度高．从离子竞争吸附的角度进行分析，对SO4^2-加速与抑制点蚀两种作用规律的形成原因进行了解释．
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| 关 键 词： | 不锈钢 临界点蚀温度 硫酸根离子 氯离子 竞争吸附 |
| 文章编号： | 0412-1961（2006）11-1187-04 |
| 收稿时间： | 2006-03-22 |
| 修稿时间： | 2006-03-222006-06-05 |
INFLUENCE OF SO4^2- IN AQUEOUS SOLUTION CONTAINING Cl^- ON THE CRITICAL PITTING CORROSION TEMPERATURE OF 316 STAINLESS STEEL |
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| LIAO Jiaxing, JIANG Yiming, WU Weiwei, ZHONG Cheng, LI Jin ,SONG Hongwei. INFLUENCE OF SO4^2- IN AQUEOUS SOLUTION CONTAINING Cl^- ON THE CRITICAL PITTING CORROSION TEMPERATURE OF 316 STAINLESS STEEL[J]. Acta Metallurgica Sinica, 2006, 42(11): 1187-1190 |
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| Authors: | LIAO Jiaxing JIANG Yiming WU Weiwei ZHONG Cheng LI Jin SONG Hongwei |
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| Affiliation: | 1.Department of Materials Science, Fudan University, Shanghai 200433;2.Technology Center of Bao Steel Ltd., Shanghai 201900 |
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| Abstract: | The influence of SO42- on the pitting corrosion behavior of 316 stainless steel has been studied by measuring the relationship of corrosion current and temperature in 0.5% Cl- solutions with different concentrations of SO42- at constant applied potentials. The results showed that with the increase of SO42- concentration, the passivation current increased and the open circuit potential decreased; When the concentration of SO42- was less (more) than 0.42%, the critical pitting temperature was lower (higher) than that without SO42-. The inhibition and acceleration effects of SO42- on the pitting corrosion were discussed by analyzing the mechanism of the ion-competitive adsorption. |
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| Keywords: | stainless steel critical pitting temperature SO4^2- Cl^- competitive absorption |
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