Barrel plating process specification for undercoating with copper cyanate

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 18; no. 3; pp. 888 - 897
• Main Authors: Han, Kyong Ho, Lee, Seung Bum, Hong, In Kwon
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.05.2012; 한국공업화학회
• Subjects: Automotive wheels; BARREL PLATING; CATHODES; Coating thickness; COATINGS; Copper; Copper cyanate; Copper plating; Electric potential; Open pore ratio; Plating; PORE SIZE AND SHAPE; Porosity; Undercoating; VOLTAGE; 화학공학; Copper cyanate; Open pore ratio; Coating thickness; Undercoating; Barrel plating
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2011.11.066

Barrel plating is a method of coating small parts using a horizontal type barrel, which can be operated automatically. Nevertheless, barrel plating for a plating material with a complex geometry has a problem with deviations in the coating thickness due to the supply of the plating solution through the barrel and irregular contact of the plating material and cathode. Therefore, this study examined the relationship between the barrel pore size, number of pores and open pore ratio in copper cyanide barrel plating as well as the plating characteristics in accordance with the process variables, such as the barrel rotation speed, plating temperature, plating voltage and plating time. An automobile wheel nut was selected as the plating material and barrel plating was carried out in a 4.7L sized barrel. The optimal part charging quantity was found to be 40ea., and the plating characteristics of the best quality for the optimal plating conditions of the barrel plating process were a plating temperature, plating voltage and rotation speed of 323K, 1V and 1.5rpm in a barrel with 22.5% of open pore ratio.