不同涂油量对汽车钢DC06电化学腐蚀行为影响规律研究  

Effect of different amounts of oil on electrochemical corrosion behavior of DC06 automobile steel

作　　者：郑昊青 郑之旺[1] 左军[1] 苏冠侨 Zheng Haoqing;Zheng Zhiwang;Zuo Jun;Su Guanqiao(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China;University of Wollongong,Wollongong,2522,Australia)

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]澳大利亚伍伦贡大学,新南威尔士伍伦贡2522

出　　处：《钢铁钒钛》2022年第2期157-162,共6页Iron Steel Vanadium Titanium

基　　金：国家高技术研究发展计划项目(2015AA03A501)。

摘　　要：利用恒温恒湿试验、电化学极化曲线测试及微区电化学阻抗测试试验对不同涂油量的DC06钢板在不同温度条件下的腐蚀规律进行了研究。结果表明:DC06钢板的腐蚀速率随温度增加而逐步提高,且当温度为40℃时,发生了严重的点蚀现象,随温度增加,腐蚀加快的程度越高。随着涂油量增加至1500 mg/m^(2),钢板的腐蚀速率下降了20%左右;DC06钢板在粗糙度为1.2μm时具有最佳的耐腐蚀性能;DC06钢板腐蚀产物的活性溶解程度随温度的增加而加大,防锈油无法在高温条件下形成稳定的保护膜层,钢板表面存在不均匀的微区阻抗特性,共同导致高温条件下DC06钢板耐蚀能力的下降。The electrochemical corrosion behavior of DC06 steel plate under different temperatures and oil content was studied by constant temperature and humidity,electrochemical polarization curve and local electrochemical impedance tests.The experimental results showed that the corrosion rate of the DC06 steel plate increased with the increase in temperature under different temperature conditions,and severe pitting corrosion occurred when the temperature was 40℃.With the increase of oil content to 1500 mg/m^(2),the corrosion rate of steel plate decreased by about 20%,and with the increase in temperature,the corrosion performance improved;DC06 steel plate with a roughness of 1.2μm can be obtained the optimum corrosion resistance.Moreover,the active dissolution degree of corrosion products of DC06 steel plate increased with the increase in temperature.The corrosion resistance of DC06 steel at high temperature was reduced due to the failure of antirust oil to form a stable protection film at high temperature and the uneven impedance characteristics of the micro area.

关 键 词：汽车钢 DC06 动电位极化曲线 涂油量 

分 类 号：TF76[冶金工程—钢铁冶金]