多因素综合海洋气候模拟加速试验技术在紧固件表面处理工艺筛选中的应用

发布时间：2019-03-19 19:22

【摘要】：目的进行表面处理工艺筛选。方法采用海洋气候多因素综合模拟加速试验技术,对镀锌三价铬钝化、镀锌六价铬钝化、镀锌镍合金、无铬锌铝涂层、拉孚铼工艺和石墨烯涂层6种汽车紧固件表面处理工艺进行试验。测定保护层初期腐蚀、保护层腐蚀10%(面积)和基体金属腐蚀10%(面积)的时间,根据检测数据评价上述工艺的保护性能并进行优劣排序。与万宁站户外暴露试验结果对比分析,验证筛选结果的正确性,同时评价海洋气候多因素综合模拟加速试验技术的加速性和相关性。结果 6种表面处理工艺出现保护层初期腐蚀的时间分别为24、48、48、48、144、72 h;保护层腐蚀10%(面积)的时间分别为48、72、72、72、216、144 h;基体金属腐蚀的时间分别为216、168、432、432、432、216 h。腐蚀外观形貌变化过程与户外暴露试验相似,平均加速倍率为21。结论上述工艺保护性能优劣排序为拉孚铼工艺、无铬锌铝涂层、锌镍合金镀层、石墨烯、镀锌三价铬钝化和镀锌六价铬钝化。海洋气候多因素综合模拟加速试验技术与户外暴露试验结果相比具有高加速性和良好相关性,筛选结果正确。
[Abstract]:Objective to screen the surface treatment process. Methods Marine climate multi-factor simulation accelerated test technique was used to passivate zinc-plated trivalent chromium, zinc-hexavalent chromium passivation, zinc-nickel alloy plating and chromium-free zinc-aluminum coating. Rhenium process and graphene coating were used to test the surface treatment of automotive fasteners. The initial corrosion, 10% (area) of protective layer and 10% (area) of base metal corrosion were measured. The protective performance of the above process was evaluated and ranked according to the test data. The results of outdoor exposure test at Wanning Station are compared and analyzed to verify the correctness of the screening results and to evaluate the acceleration and correlation of multi-factor integrated simulation of marine climate acceleration test technology. Results the initial corrosion time of the protective layer was 24,48,48,48,144,72 hours, the corrosion time of 10% (area) was 48,72,72,72216144 hours, and the corrosion time of base metal was 216168432432432432216 hours, and the corrosion time of the base metal was 2161684332432432216 h, and the corrosion time of the base metal was 216168432432432216 h. The change process of corrosion appearance was similar to that of outdoor exposure test, and the average acceleration rate was 21. 3%. Conclusion the protective properties of the above processes are in the following order: Rafu-re process, chromium-free zinc-aluminum coating, zinc-nickel alloy coating, graphene, zinc-plated trivalent chromium passivation and zinc-hexavalent chromium passivation. Compared with outdoor exposure test results, the multi-factor integrated simulation accelerated test technique for marine climate has high acceleration and good correlation, and the screening results are correct.
【作者单位】：西南技术工程研究所;
【分类号】：TB306

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