CR.sub.2 O.sub.3 -protective coating and process for its manufacture
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United States of America Patent
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Feb 6, 1990
Issued Date -
N/A
app pub date -
May 22, 1989
filing date -
Apr 17, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The Cr.sub.2 O.sub.3 protective coating (3) is applied, during the vacuum spray process, as a leakproof coating to a support (1), and has a density of not more than 5.3 g/cm.sup.3, a residual porosity of less than 2%, a Vickers hardness (HV) of over 2000 kp/mmm.sup.2 and an electric strength of at least 5 V/.mu.m of protective thickness; it is particularly suited as a protective coating on supports (3) exposed to corrosion and simultaneously subjected to high mechanical loads.
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