电镀不锈钢工艺及镀液稳定性的研究

为了提高电镀不锈钢镀液的稳定性能,采用蓄电池耐腐蚀隔膜材料将石墨阳极与电镀液隔离,阳极区电解液中不加Fe2 和Cr3 盐,连续电镀30 min,阴极区Fe3 质量分数为0.35g/L,未加隔膜时为1.10g/L,累计电镀120 min,Fe3 降至0.18g/L.该工艺克服了镀液中Fe3 持续升高和由此引起的电镀试片发黑问题,镀出的双层镍-非晶态不锈钢防护装饰镀层试件经16 h连续喷雾,并经保温8 h的铜加速醋酸试验,保护等级在9级以上,外观无明显变化.

Electroplating Stainless Steel Technology and Stability of Bath

In order to improve the stability of electroplating stainless steel solution, membrane material used in storage battery with corrosion resistance is adopted to insulate the graphite anode from bath. Without adding Fe~(3+)and Cr~(3+)in anodic area, the Fe~(3+)content in cathodic area is 0.35 g/L with membrane but 1.10 g/L without membrane after electroplating 30 minutes.Keeping on electroplating 120 minutes, the Fe~(3+)content decreases to 0. 18 g/L. The technology overcomes the increasing of Fe~(3+)in bath, which will result in blackening of sample. The formula and process is listed. The electroplated double Ni-amorphous stainless steel coatings is above ninth protective grade without obvious change of appearance after copper accelerating acetic acid corrosion test that continuously spraying 16 hours and temperature preserving 8 hours.