Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1990-05-09
1991-05-14
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
428653, 428941, B32B 1518
Patent
active
050155350
ABSTRACT:
The present invention relates to a ferrous article suitable for use in devices for burning heavy and extra heavy petroleum fuels and a process for forming such an article. The article has a matrix formed from a low carbon steel and a corrosion resistant chromium-aluminum diffusion coating on at least one surface. The coating is formed by subjecting the matrix to successive aluminization and chromization pack cementation treatments.
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Marquez Edmundo M.
Nowak Jean-Francois
Robles Antonio
Intevep S.A.
Zimmerman John J.
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