Phosphatization liquid for unvarnished iron pipes of window guardrails
A technology of phosphating solution and guardrail, applied in the direction of metal material coating process, etc., can solve the problems of slow fusion speed, affecting environmental quality, harsh operating environment, etc., and achieve the effect of increasing current density, accelerating growth speed, and expanding cathode range.
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Embodiment 1
[0012] A kind of phosphating solution before iron pipe painting for window guardrail, the composition of this phosphating solution is: zinc oxide 20g / L; Manganese dihydrogen phosphate 19g / L; 85% phosphoric acid 40g / L; Hydroquinone 20g / L ; tartaric acid 6g / L; citric acid 6g / L; nickel nitrate 1g / L; sodium fluoride 3g / L; sodium nitrite 1g / L; sodium chlorate 2g / L; the balance is water.
Embodiment 2
[0014] A kind of phosphating solution before iron pipe painting for window guardrail, the composition of this phosphating solution is: zinc oxide 24g / L; Manganese dihydrogen phosphate 15g / L; 85% phosphoric acid 44g / L; Hydroquinone 14g / L ; tartaric acid 10g / L; citric acid 2g / L; nickel nitrate 2g / L; sodium fluoride 1g / L; sodium nitrite 3g / L; sodium chlorate 1g / L; the balance is water.
Embodiment 3
[0016] A kind of phosphating solution before iron pipe painting for window guardrail, the composition of this phosphating solution is: Zinc oxide 21g / L; Manganese dihydrogen phosphate 18g / L; 85% phosphoric acid 41g / L; Hydroquinone 18g / L ; tartaric acid 7g / L; citric acid 5g / L; nickel nitrate 1.3g / L; sodium fluoride 2.5g / L; sodium nitrite 1.3g / L; sodium chlorate 1.7g / L; the balance is water.
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