Patent ID: 11920244
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  G  H | IPC C  G

Claim 12:
13. The method as claimed in claim 11, wherein treating the magnesium-alloy substrate comprises one of:
oxidizing the magnesium-alloy substrate through micro-arc oxidation (MAO) process to form the oxide layer on the magnesium-alloy substrate, wherein the oxide layer is formed using an electrolytic solution comprising electrolytes selected from the group consisting of sodium silicate, sodium phosphate, potassium fluoride, potassium hydroxide, sodium hydroxide, fluorozirconate, sodium hexametaphosphate, sodium fluoride, aluminum oxide, silicon dioxide, ferric ammonium oxalate, phosphoric acid salt, polyethylene oxide alkylphenolic ether, and combinations thereof; or
chemically treating a surface of the magnesium-alloy substrate with a passivation chemical to obtain the passivation layer, wherein the passivation layer includes a non- metallic surface, and wherein the passivation chemical is selected from the group consisting of molybdates, vanadates, phosphates, chromates, stannates, manganese salts, and combinations thereof.