Process for producing a protective film on magnesium containing

Details Process for producing a protective film on magnesium containing Process for producing a protective film on magnesium containing

1989-07-03

1990-12-25

Morgenstern, Norman

Coating processes

Coating by vapor, gas, or smoke

Metal coating

427250, 4272553, 4272557, 427353, 427405, 4274192, C23C 1612, C23C 1640, C23C 1646, C23C 1656

Patent

active

049802038

ABSTRACT:
A process for producing a protective film on a magnesium based metallic substrate comprising producing successive deposits by vapor phase chemical deposition of at least one intermediate layer of metallic aluminum, and at least one surface layer of metallic oxide, and for the intermediate aluminum layer using a precursor chosen of triisobutylaluminum, heating the substrate to a temperature between 250.degree. C. and 320.degree. C., and for the surface layer selecting an appropriate precursor, heating the substrate to an appropriate temperature and introducing the precursor vapor to produce a protective film having a high surface hardness and strong adherence to the magnesium based substrate with high inertness in the electrochemical series, and forming an effective protection under both static and dynamic conditions.

REFERENCES:
patent: 2784486 (1957-03-01), Langer et al.
patent: 2847320 (1958-08-01), Bulloff
patent: 2867546 (1959-01-01), MacNevin
patent: 2982016 (1961-05-01), Drummond
patent: 4395437 (1983-07-01), Knapp
patent: 4659629 (1987-04-01), Gartner et al.

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