The protective lining in the two layers, for parts subjected to a high heat, executed by spraying, by sputtering, of a plasma or hot raw

摘要

A protective coating for heat stressed parts, particularly firing chambers of steam boilers, comprises a first, base, layer and a second, upper, layer. The base layer comprises nickel and 10 to 30% by weight of chromium and the upper layer comprises aluminium oxide and up to 20%, more particularly up to 10%, by weight of titanium dioxide.