Long life coater blade covered with special chromium plating.

Waste Minimization in Chromium Plating Industry Waste Minimization in Chromium Plating Industry

Membrane electrolysis (ME) is the only commercial technology using ion-exchange membranes for chromic acid recycling and recovery. On one hand, the technology has a number of promising advantages, but on the other hand, it has not yet gained common acceptance probably due to a lack of operation stability and efficiency. Published results of the research can be divided into three categories: lab...

Total removal of heavy metal from mixed plating rinse wastewater ABSTRACT A mixed plating rinse wastewater containing zinc, hexavalent chromium, trivalent chromium, and cyanide with total dissolved solids

A mixed plating rinse wastewater containing zinc, hexavalent chromium, trivalent chromium, and cyanide with total dissolved solids of 424 mg/1 was treated by a model consisting of a sand filter and ion exchange columns. A strongly acidic cation resin in hydrogen form and a strongly basic anion resin in hydroxide form were used in the columns as cationic and anionic exchangers, respectively. The...

Alternatives to hard chromium plating on piston rods

As a main part of hydraulic cylinder, the piston rod is used in tough surrounding and corrosive condition; consequently a high quality protecting layer is essential. Currently EHC, electroplating hard chromium (hard chrome) is a widespread method for piston rod due to powerful performance and low cost. Unfortunately the plating process contains hexavalent chromium (Cr) which is toxic and carcin...

An epidemiological study on lung cancer among chromium plating workers.

High risk of lung cancer among chromate workers have been reported by many investigators, but it has been limited to the refining process. A recent report demonstrated that there was a significantly high number of deaths from cancer among chromium platers. In this report, a cohort study was carried out on platers in Tokyo. Among 952 chromium platers who were followed up from April 1, 1970 to Se...

Pollution Prevention Technology Profile Trivalent Chromium Replacements for Hexavalent Chromium Plating