用于钢铁零件工序间防锈的植酸防锈液研制及其性能

以环保特性优良的植酸为基本成分(150 mg/L),通过添加少量生物缓蚀剂、稀土缓蚀剂等成分作为工序间零件的防锈溶液,对机加工零件经过工序间防锈处理的试样进行湿(相对湿度90%)热(50℃)环境下的加速腐蚀、中性盐雾腐蚀试验,考察机加工钢铁零件经过工序间防锈处理后的防锈性能和电化学行为。试验结果表明:工序间防锈液处理的零件在高温高湿环境下的防锈性能优良。工序间防锈液中的植酸与生物缓蚀剂、稀土缓蚀剂在钢铁零件工序间防锈处理中具有协同效应。经工序间防锈液处理的试样其阻抗谱出现两个容抗弧,且腐蚀电位正移400 mV。

Study on phytic acid antirust solution for interprocess rust-proofing of steel parts

An interprocess antirust solution consisting of phytic acid with biological corrosion inhibitor and rare earth inhibitor was prepared and its performance for interprocess rust-proofing of steel parts was evaluated.Corrosion experiments of steel Q235 treated with the antirust solution were conducted in hygrothermal environment(relative humidity 90%,50 ℃) and neutral salt spray envorionment,and antirust property and behaviour of electrochemistry of the treated steel were examined.The results show that the antirust property of the steel treated with interprocess antirust solution is excellent under the enviroments of high temperature and high humidity.The phytic acid,biological inhibitor and rare earth inhibitor,present a synergy effect in the process of rust-proofing treatment.The EIS diagram of the treated steel has two capacitive loops,and the corrosion potential positively shifts about 400 mV.