【作者】 吴红艳； 张程远； 翁镭； 杜林秀；

【Author】 WU Hongyan;ZHANG Chengyuan;WENG Lei;DU Linxiu;State Key Lab of Rolling and Automation, Northeastern University;

【机构】 东北大学轧制技术及连轧自动化国家重点实验室；

【摘要】 利用周期浸润腐蚀实验研究了V-Ti耐候钢在模拟工业大气环境下的腐蚀演化行为。结果表明,P、Ti元素促使腐蚀产物从针状或棉絮状不稳定的γ-Fe OOH向圆球状稳定的α-Fe OOH的转变,使锈层具有保护性。并且Cu、P、Cr、Ni等合金元素分布在锈层中的裂纹、孔洞等缺陷处,使得锈层更加致密,阻断了腐蚀介质的进入,使腐蚀速率稳定。随着腐蚀时间增加,锈层厚度和致密性都有所增加,有效隔离电解液和基体,减缓基体的进一步腐蚀,Ti元素的加入有利于腐蚀初期锈层的生成。腐蚀后期,Cu、P的复合作用有利于锈层的进一步致密化,并配合Ti元素促进α-Fe OOH的转化,提高了耐腐蚀性。更多还原

【Abstract】 The corrosion evolution of V-Ti container weathering steel in a simulated industrial atmosphere environment was studied by immersion cycle corrosion test. It showed that P and Ti prompted corrosion products from needles or cotton wool unstable γ-Fe OOH to α-Fe OOH stable transition spherical, so rust layer has a protective effect. Cu, P, Cr, Ni and other alloying elements distributed in the rust layer cracks, holes and other defects, which made the rust layer more dense and hinder the corrosive medium invade, so the corrosion rate stabilized. Increases over time, the rust layer thickness and compactness have increased, effectively isolate the electrolyte and the matrix, slowing further corrosion of the substrate, Ti elements are conducive to generating initial corrosion rust layer. Late corrosion, Cu, P composite action in favor of the rust layer further densification, and promote the transformation of Ti with α-Fe OOH, improved corrosion resistance.更多还原