| 摘要 |
A corrosion resistant coating on steel is formed by depositing a porous layer of chromium metal onto a substrate, preferably by plasma spraying and thereafter exposing the layer to a halide activator at elevated temperatures to react with the chromium layer to form chromium halides and deposit chromium onto the substrate. The deposited chromium diffuses into the substrate, which may be a low carbon steel. The halide activator may be provided in a solid particle pack although it may also be from a vapour source. The coated steel is used in casings of sodium sulphur cells. |
