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硅酸盐是一种环保型的缓蚀剂,研究水溶液中硅酸盐与铁表面氧化物的相互作用对铁器文物脱盐清洗液的实际应用有较大的指导意义。本工作研究了羟基氧化铁对硅酸盐的吸附作用以及多种因素对Fe/FeOOH/Na_2SiO_3体系电化学行为的影响,并运用XRD技术分析研究了硅酸盐水溶液处理对钢铁表面氧化物形态的影响。结果表明,在Fe/FEOOH/Na_2SiO_3体系中,硅酸盐吸附在钢铁表面羟基氧化物上,反应生成了新的物质,形成了较为致密的缓蚀膜,可同时抑制钢铁的阴、阳极反应,且对阴极反应的抑制作用较强。
Silicate is an environmentally friendly corrosion inhibitor. Studying the interaction between silicate and iron surface oxide in aqueous solution is of great instructive significance for the practical application of iron desalination cleaning fluid. In this work, the adsorption of silicate by iron oxyhydroxide and the influence of various factors on the electrochemical behavior of Fe / FeOOH / Na_2SiO_3 system were studied. The effects of silicate aqueous solution on the morphology of the surface oxides influences. The results show that in the Fe / FEOOH / Na_2SiO_3 system, silicate adsorbed on the surface of the steel oxide, the reaction of the formation of new substances, the formation of a more compact corrosion film, which can inhibit both the anode and cathode reaction of steel, And the inhibition of the cathode reaction stronger.