一种汽车金属材料表面涂镀层六价铬含量快速定量方法

A Rapid Quantitative Method for Cr^(6+) Content of Automobile Metal Surface Coating

六价铬广泛存在于汽车金属材料表面涂镀层及皮革之中,六价铬测试是汽车材料禁用物质测试必不可少的一项指标。为了进行汽车金属材料表面涂镀层中六价铬含量的测试,通过试纸法建立了一种快速半定量检测程序。与QC/T 942—2021《汽车材料中六价铬的检测方法》中紫外法、点测试2种测试方法进行了比对试验,本方法的试验结果与传统定性、定量测试方法的试验结果基本一致。本方法的操作过程更为简便,传统方法完成整个试验需要4~8 h,本方法试验完成时间小于5 min,同时节省了大量试验耗材,减少了废弃物排放。

Cr^(6+) is widely applied in automotive metal coating and leather,Cr^(6+) test is an indispensable index for the test of prohibited substances on automobiles.In order to test Cr^(6+) content in the metal coating of automotive materials,a rapid semi-quantitative detection procedure was established by the test strip method.Compared with ultraviolet method and point test method in QC/T 942—2021 Test Methods of Hexavalent Chromium in Automotive Materials,results of the strip test method are basically consistent with traditional qualitative and quantitative test methods.The advantage of strip test method is that the test can be completed within 5 minutes,far less than that of the traditional method that takes 4 to 8 hours.Meanwhile,operation of the test is simple,which saves large amount of test consumables and reduces waste discharge.