化学处理，例如重铬酸钠溶液，可以促进无氧化膜和杂质不锈钢表面的钝化膜更快速度的生成。
Chemical treatments, such as sodium dichromate solutions, may facilitate the more rapid formation of the passive film on a stainless steel surface already free of scale or foreign matter.
通过对比测试，结果发现使用自动检测仪器方法与使用重铬酸盐法测定不同水样的COD值时，两者没有显著性差异。
Through the contrast test, the author discovered that no obvious difference could be found in determining COD by using both methods of instrumental detection and dichromate process.
重铬酸根与磁场对铁在硫酸溶液中阳极极化行为的影响。
Effect of magnetic field and dichromate on anodic polarization behavior of iron in sulfuric acid.
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