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

Claim 8:
9. The electronic device as claimed in claim 8, wherein:
the oxide layer is formed by a micro-arc oxidation (MAO) process 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
the passivation layer is formed by chemically treating a surface of the magnesium- alloy substrate with a passivation chemical to obtain a non-metallic surface over the magnesium-alloy substrate, wherein the passivation chemical is selected from the group consisting of molybdates, vanadates, phosphates, chromates, stannates, manganese salts, and combinations thereof.