Corrosion-resisting surface treatment method for stainless steel in high-corrosion environment
A corrosive environment and surface treatment technology, applied in chromate treatment, surface reaction electrolytic coating, electrolytic inorganic material coating and other directions, can solve the problems of intensified corrosion, high cost, restricting production development, etc., reaching time-consuming The effect of short, outstanding anti-fouling ability and dense film layer
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Embodiment 1
[0017] Treatment of ring packing 304 base material
[0018] Process route: hot alkali chemical degreasing-hot water washing-water washing-water washing-oxidation-water washing-water washing-water washing-electrolysis-water washing-water washing-water washing-natural drying
[0019] Use hot alkali to chemically remove oil, and the solution temperature is controlled at 90°C to completely remove the oil stains on stainless steel parts during processing;
[0020] The oxidation step:
[0021] The composition of the oxidation solution includes CrO3 200g / L, H 2 SO 4 150g / L, Na 2 MoO 4 100g / L. Under the temperature condition of 75°C, the oxidation time is 10 minutes.
[0022] Wherein the electrolysis step:
[0023] The electrolytic solution composition includes CrO 3 100gL, H 2 SO 4 150gL, Na 2 MoO 4 100gL, H 3 PO 4 250g / L. The stainless steel piece was used as the cathode, and electrolyzed for 10 minutes at room temperature.
[0024] The washing and drying step:...
Embodiment 2
[0028] The treatment process of plate packing
[0029] Process route: hot alkali chemical degreasing - hot water washing - water washing - water washing - oxidation - water washing - water washing - water washing - electrolysis - water washing - water washing - water washing - natural drying
[0030] Use hot alkali to chemically remove oil, and the temperature of the solution is controlled at 95°C to completely remove the oil stains on stainless steel parts during processing;
[0031] The oxidation step:
[0032] The composition of the oxidation solution includes CrO3 300gL, H 2 SO 4 280g / L, Na 2 MoO 4 50g / L. Under the temperature condition of 85°C, the oxidation time is 10 minutes.
[0033] Wherein the electrolysis step:
[0034] The electrolytic solution composition includes CrO 3 50gL, H 2 SO 4 300gL, Na 2 MoO 4 45gL, H 3 PO 4 500g / L, stainless steel parts as the cathode, electrolysis at room temperature for 10 minutes.
[0035] The washing and drying s...
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