| 碳钢及低合金钢点蚀性能的研究 |
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| 引用本文： | 张恒,常万顺,陈学群.碳钢及低合金钢点蚀性能的研究[J].全面腐蚀控制,2011(6):41-44,48. |
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| 作者姓名： | 张恒 常万顺 陈学群 |
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| 作者单位： | 1. 92601部队,广东,湛江,524009
2. 海军工程大学理学院化学与材料系,湖北,武汉,430033 |
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| 摘 要： | 选择三种典型的碳钢、低合金钢,通过极化试验比较了它们之间的点蚀诱发敏感性和模拟孔蚀的"闭塞腐蚀电池",试验研究了它们之间的孔蚀扩展行为。结果表明,B钢的点蚀诱发能力小于A钢和C钢;在同样的阴极极化电位下,B钢的阳极溶解电流也明显小于后两者。电子探针分析了不同夹杂物在诱发点蚀过程的腐蚀特征,夹杂物是钢中主要的点蚀诱发源。显微分析"闭塞腐蚀电池"腐蚀形貌,发现腐蚀形貌具有平行沟槽状。初步分析原因是沿轧向延伸的磷偏析带及夹杂物所导致的。扫描电镜和能谱仪对腐蚀产物的形貌、成分分析结果表明:B钢的锈层均匀致密,而A钢的锈层呈网状、疏松且有大量裂纹和孔洞。
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| 关 键 词： | 点蚀 夹杂物 闭塞腐蚀电池 磷偏析 |
Reserch of Pitting in Carbon Steel and Low Alloy steel |
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| ZHANG Heng,CHANG Wan-shun,CHEN Xue-qun.Reserch of Pitting in Carbon Steel and Low Alloy steel[J].Total Corrosion Control,2011(6):41-44,48. |
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| Authors: | ZHANG Heng CHANG Wan-shun CHEN Xue-qun |
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| Affiliation: | ZHANG Heng1,CHANG Wan-shun2,CHEN Xue-qun2(1.Troops of 92601,Zhanjiang 524009,China,2.Department of Chemistry and Material,University of Naval Engineering,Wuhan 430033,China) |
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| Abstract: | A low-carbon steel and two low-alloy steels have been selected.Their susceptibility to pitting has been compared by means of polarization test,and their behavior of pitting propagation has been studied with OCC si-mulation test.The results showed that the susceptibility of steel B to pitting initiation was obviously lower than steels A and C.At the same cathodic polarization potential,the anodic dissolution current of the B was smaller thanA and C.Characteristic of pitting initiated by different inclusions ... |
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| Keywords: | pitting inclusion OCC phosphoric segregation |
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