Stainless steel whitening solution and whitening technique thereof
A stainless steel and whitening technology, applied in the field of whitening solution and its whitening process, can solve the problems of high risk factor, great environmental harm, no metallic luster, etc., and achieve the effect of small risk factor and low environmental harm.
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[0017] The stainless steel whitening solution provided by the present invention uses water as a solvent, and each liter of the solution contains:
[0018] Nitric acid 4%-10%;
[0019] Phosphoric acid 10-40g;
[0020] Boric acid 2-5g;
[0021] Acetic acid 5-30g;
[0022] Ammonium sulfate 10-30g;
[0023] Trisodium phosphate 10-30g;
[0024] Ammonium bifluoride 15-35g.
[0025] Please refer to FIG. 1, which is a process flow diagram of using the stainless steel whitening solution of the present invention to whiten the surface of stainless steel.
[0026] As shown in Figure 1, the process flow is:
[0027] Pretreatment, mainly to remove impurities and dirt on the surface of stainless steel;
[0028] Degreasing, put the pretreated stainless steel into a solution containing 5g / L sodium hydroxide and 3g / L sodium dodecylbenzene sulfonate at a temperature of 40°C for 5 minutes;
[0029] Pickling in acid, put the degreased stainless steel in a solution containing 5% sulfuric acid and alumi...
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