通过正交试验研究了热镀锌层镧盐转化膜的成膜影响因素，探讨了处理液成分、成膜温度和成膜时间等对热镀锌钢钝化膜的影响，确定了最佳成膜工艺参数范围：La（NO3）3·6H2O20g／L，H2O2浓度8～12ml／L，处理温度65～80℃，成膜时间10～30min，溶液pH值4．0。中性盐雾试验结果表明，采用该工艺处理镀锌钢，可以显著降低镀锌钢的腐蚀速率。
The influencing factors of film formation on the corrosion resistance of lanthanum conversion film on hot dip galvanized steel were studied by the orthogonal experiment. The influences of bath composition, treatment temperature and time on the properties of conversion film were discussed. The optimum parameters gained from orthogonal tests were： La（NO3）3·6H2O20 g/L, H202 8-12 ml/L, T 65-80℃, t 10-30 min, pH 4. 0. The corrosion resistance of the lanthanum conversion film was evaluated by salt spray test. The results showed that the lanthanum conversion film was silvery gray, uniform and its corrosion rate decreased significantly compared with that of the hot dip galvanized steel.
参考文献
| [1] | 卢锦堂,钟正,孔纲.热镀锌层镧盐转化膜的结构及其耐蚀性能[J].材料保护,2009(04):7-9. |
| [2] | Montemor MF.;Simoes AM.;Ferreira MGS. .Composition and corrosion behaviour of galvanised steel treated with rare-earth salts: the effect of the cation [Review][J].Progress in Organic Coatings: An International Review Journal,2002(2):111-120. |
| [3] | LU Jin-tang,WU Hai-jiang,KONG Gang,CHE Chun-shan,XU Qiao-yu.Growth and corrosion behavior of rare earth film on hot-dip galvanized steel[J].中国有色金属学会会刊（英文版）,2006(06):1397-1401. |
| [4] | 彭天兰,满瑞林,徐斌.镀锌钢板表面耐腐蚀稀土镧盐转化膜的制备[J].涂料工业,2008(11):51-53,58. |
| [5] | 孔纲,刘玲艳,钟正,卢锦堂.热镀锌后镧盐转化膜的制备及耐蚀性能[J].材料保护,2010(07):36-39. |
| [6] | Scholes FH;Soste C;Hughes AE;Hardin SG;Curtis PR .The role of hydrogen peroxide in the deposition of cerium-based conversion coatings[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2006(4):1770-1780. |
| [7] | M.F.Montemor;A.M.Simoes;M.G.S.Ferreira .Composition and behaviour of cerium films on galvanised steel[J].Progress in Organic Coatings: An International Review Journal,2001(4):274-281. |
| [8] | 孔纲,刘仁彬,卢锦堂,车淳山,钟正.热镀锌表面镧盐转化膜生长机理的研究[J].金属学报,2010(04):487-493. |
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