六价铬电镀具有毒性大、环境污染严重等缺点。
Hexavalent chromium plating has weaknesses such as toxicity and environmental pollution.
六价铬电镀工艺存在严重的环境污染问题，利用三价铬镀铬取而代之已经迫在眉睫。
It's urgent to develop the technique of trivalent chromium plating because of the heavy pollution of hexavalent chromium plating.
六价铬化合物常用于电镀，制革及纺织制造，还存在于一些饮用水水源中。
Hexaalent chromium compounds are often used in electroplating leather tanning and textile manufacturing and hae been found in some drinking water sources.
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