1.With regards to the surface treatment, our crafts include nigrescence, phosphorization, zinc plating, dacromet, nickel plating and copper plating.

1.表面处理有发黑、磷化、机械镀锌、达克罗、镀镍、镀铜等工。

2.Used AgNO3 Standard solution to measure the content of mercapto heterogeneous ring compound and thioureido derivative in acid coppering gloss agent continuously by potentiometric titration.

2.酸银标准溶液，采用电位滴定法，连续测定酸性镀铜光充剂中的巯基杂环化合和硫脲衍生的含量。

3.The product has red dumet wire, pale (golden yellow) dumet wire, white dumet wire, no B dumen wire and luminous (is moisture-proof) dumet wire etc.

3.先进的表面镀铜（或套铜）技术使表面状态呈均匀的砖红色或黄色等。产品有红、淡（金黄）色、白、无硼和光亮（防潮型）等。

4.Cu-Sn alloy coating with different Sn content can be replacement plating out on iron and steel surface in a solution comprising of copper sulfate, stanous sulfate, complexant and stabilization agent.

4.铁件在由硫酸铜、硫酸亚锡、络合剂、稳定剂等组成的溶液中,可置换镀覆不同锡质量分数的铜- 锡合金镀层,其工可替代氰化预镀铜,消除氰化污染,是实现电镀清洁生产措施之一。