暗灰色

Some common troubles such as poor throwing power,burnt deposit on rim,dull gray coating,piebaldism,blue film,hazy deposit,spongy surface and roughness in decorative chromium plating were summarized.

介绍了装饰性镀铬最常见的质量故障:均镀能力差、边角易烧焦、铬层暗灰色、花斑、蓝膜、雾状、麻面和粗等。