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Bluing baotou steel belt production process

by:Hongmei     2020-07-03
Bluing dozen steel belt is focused on & other; Bluing & throughout; The word, the general bluing called oxidation or blue, is to play in a solution of baotou steel belt in oxidizing, make its surface form blue-black oxidation film process. Play bluing clad steel belt oxidation process are mainly: first to remove grease, oil film and impurities on the surface of the steel belt, in 100 ~ 180 g/L - H2SO4 solution to remove rust stain and so on, then rinse after oxidation. Play clad steel belt oxidation is usually in 550 ~ 700 g/L of NaOH and 100 ~ 250 g/L of NaNO2 solutions, solution temperature 140 ~ 145 ℃, oxidation of 60 ~ 120 min. Rinse off with clear water after oxidation, and then in 30 ~ 50 g/L of soap, PH 7 ~ 8. 5, the temperature of 80 ~ 90 ℃ in the saponification solution soak 5 ~ 10 min, in order to improve the anti-corrosion ability of oxide film in damp medium.
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