环保型水基防锈剂的研制

Preparation of Environmentally Acceptable Water-Based Rust Inhibitor

为了克服目前水基防锈剂防锈效果差、含亚硝酸盐等有毒物质以及成本较高等缺点,以硅酸盐为主料,与多种不同类型的防锈助剂进行复配,制备了环保型水基防锈剂。通过外观表征、NaCl盐水浸泡、湿热试验、Tafel极化曲线测试和扫描电镜观察等方法对制备的防锈剂的性能进行评价,选出了与硅酸盐具有协同作用的物质。通过正交试验确定了防锈剂的最佳配比并研究了各种因素对该防锈剂防锈性能的影响。结果表明,最优防锈剂配方为:在50 mL600 g/L的硅酸盐中加入50 mL水,0.10 mL三乙醇胺,0.05 g硼酸,0.08 g乙二胺四乙酸,0.40 g钨酸钠。该防锈剂可使钢铁的腐蚀速率明显降低,并且防锈剂成膜均匀致密,防锈效果好、成本低,具有很好的应用前景。

A kind of environmentally acceptable water-based anti-rust agent containing silicate as the major component was prepared by complexing with various anti-rust auxiliaries.The performance of resultant rust inhibitor was evaluated based on observation of appearance,immersion test in NaCl solution,humid test,measurement of Tafel polarization curve and observation of scanning electron microscopy,and the auxiliaries possessing synergistic anti-rust function with silicate were selected.Orthogonal tests were carried out to determine the optimized composition of the anti-rust agent,and the effects of various factors on the anti-rust performance of the anti-rust agent were investigated.It was found that the rust inhibitor obtained by introducing 50 mL H2O,0.1 mL triethanolamine,0.05 g boric acid,0.08 g ethylene diamine tetraacetic acid and 0.40 g sodium tungstate into 600 g/L silicate solution possessed the best anti-rust performance.Resultant rust inhibitor with a low cost was able to generate uniform and compact anti-rust coating and hence significantly decreased the corrosion rate of iron and steel,showing promising application prospects.