Surface phosphorization treatment agent of chemical pump stainless steel pump shell

[0015] Example 1

[0016] A chemical pump stainless steel pump casing surface phosphating treatment agent, consisting of solution A and solution B;

[0017] The solution A is made of the following components in parts by weight: bismuth molybdate 1, sodium chloride 4, potassium carbonate 4, urea 1, water 80;

[0018] The solution B is made of the following components in parts by weight: 4 maleic anhydride, 8 ammonium phosphate, 1 sulfuric acid, 2 zinc dihydrogen phosphate, 0.2 acid additives, 1 potassium hypochlorite, 70 water; The agent is made of the following components in parts by weight: 4 alanine, 4 glycine, 1 citric acid.

[0019] Example 2

[0020] A chemical pump stainless steel pump casing surface phosphating treatment agent, consisting of solution A and solution B;

[0021] The solution A is made of the following components in parts by weight: bismuth molybdate 5, sodium chloride 8, potassium carbonate 8, urea 3, water 100;

[0022] The solution B is made of the following components in parts by weight: maleic anhydride 5, ammonium phosphate 10, sulfuric acid 3, zinc dihydrogen phosphate 4, acid additives 0.6, potassium hypochlorite 3, water 80; the acid additives The agent is made of the following components in parts by weight: 4 alanine, 4 glycine, 1 citric acid.

[0023] Example 3

[0024] A chemical pump stainless steel pump casing surface phosphating treatment agent, consisting of solution A and solution B;

[0025] The solution A is made of the following components in parts by weight: bismuth molybdate 3, sodium chloride 6, potassium carbonate 6, urea 2, water 90;

[0026] The solution B is made of the following components in parts by weight: 4.5 parts by weight of maleic anhydride, 9 parts ammonium phosphate, 2 parts sulfuric acid, 3 parts zinc dihydrogen phosphate, 0.4 parts of acid additives, 2 parts of potassium hypochlorite, and 75 parts of water; The agent is made of the following components in parts by weight: 4 alanine, 4 glycine, 1 citric acid.

[0027] Phosphating film performance test:

[0028] Table 1

[0029] Adhesion / MPa Brightness Total time of solution A and B treatment / min Example 1 6.44 81 10 Example 2 6.50 83 8 Example 3 6.46 82 9 Comparative example 1 4.28 65 15