Dyeed surface treatment agent for anodized film of aluminum or aluminum alloy, surface treatment method using the same, sealing treatment method and article

摘要

The present invention provides a surface treatment agent and a surface treatment method capable of improving the light resistance of an anodized film of aluminum or an aluminum alloy dyed with a dye and improving the dye fixing property. The present invention relates to a surface treatment agent for anodized film of aluminum or aluminum alloy which is dyed and contains a zirconium fluoride salt and has a pH of 3.4 or less. provide.