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基于环保及同时适用于多种金属材料工序间防锈的要求,研究了出一种由植酸、复合缓蚀剂等成分构成的工序间防锈液(pH 7-8)。大气环境暴露、叠片、腐蚀性实验等结果表明,经过防锈液处理的钢、铜、铝合金材料具有优良的工序间防锈性能;防锈液中的不同缓蚀剂成分对钢、铜、铝合金材料发挥协同防锈作用,是提高3种材料工序间防锈性能的关键。植酸、复合缓蚀剂等产生的协同效应促使钢表面形成致密均匀的吸附络合膜,其自腐蚀电位由-0.74 V正移到-0.08 V,腐蚀电流明显减小;铜、铝合金材料随工序间防锈处理时间的延长,表面的自腐蚀电位也明显正移,工序间防锈性能得到提高。
Based on the environmental protection and the requirements of anti-rust for various metal materials, a rust-proofing solution (pH 7-8) consisting of phytic acid, compound corrosion inhibitor and other components was developed. Atmospheric environmental exposure, lamination, corrosive experiments and other results show that after antirust liquid steel, copper, aluminum alloy material has excellent anti-rust performance between processes; antirust liquid composition of different corrosion inhibitors of steel, copper , Aluminum alloy material to play a synergistic anti-rust effect, is to improve the anti-rust performance of the three materials processes the key. The synergistic effect of phytic acid and composite corrosion inhibitor promoted the formation of dense and uniform adsorption complex membrane on the steel surface. The self-corrosion potential was shifted from -0.74 V to -0.08 V, and the corrosion current decreased obviously. The corrosion resistance of copper and aluminum alloy With the anti-rust processing time between the extension of the surface of the corrosion potential is also significantly positive shift between the anti-rust performance has been improved.