| 摘要 |
A method of passivating a zinc-cobalt alloy, which alloy has a cobalt content of 0.1-2%, by contacting the alloy with an aqueous composition which has a pH of 0.5-2.5 and contains hexavalent chromium, hydrogen ions to provide the pH, chloride ions and sulfate ions and which may also contain nickel and/or cobalt ions.
|
