| abstract |
Provided are a top coat paint having good rust resistance and good adhesion, and a corrosion resistant surface-treated chain and a corrosion resistant surface-treated sprocket, on which a coating film is formed by using the top coat paint so as to prevent the occurrence of coating film powder and to exhibit good corrosion resistance. n The roller chain 10 comprises inner link plates 11, a bush 12, outer link plates 13, a connecting pin 14, and a roller 15. Each of the chain components has a zinc-iron alloy ground film formed on an iron-based base material by impact zinc plating and a first coating film formed by using a water-based rust preventive paint including zinc, nitrate, and an organic compound having a mercapto group other than a mercapto group-containing silane coupling agent. Then a second coating film is formed on the first coating film by using the top coat paint comprising a pigment, sodium silicate, and an acrylic emulsion or a polyurethane water-based composition. |