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blackening
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nature : through strong oxidizing alkaline solution of oxidation in steel in the form on the surface layer of black iron oxide film method. Increase resistance, wear resistance and gloss. Applied machine parts, equipment parts and so on. Usually by the first oil and remove oxidation Paper, immersed in sodium hydroxide, sodium nitrite, sodium nitrate and sodium chlorate are dubbed in the solution (containing a small amount of tannic acid and sodium salt of tartaric acid), the Baptist around 300 ° C for about 10 minutes and then washing with hot water, dried with soap after handling, again with spindle oil or transformer oil treatment derived.


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Structure:
Please see below "More Detailed Data"
More Detailed Data:
1) boiling black
2) blackening transformation
3) blackening transformation P
4) blackening transformation W
Notice Some description was translated by software and the data is only as a reference.
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