Metal pickling inhibitor and method for preparing the same
A metal acid and corrosion inhibitor technology, which is applied in the field of biological corrosion inhibitors, can solve the problems of high production and use costs, large additions of corrosion inhibitors, and complicated preparation processes, and achieve low production costs, environmental protection, The effect of simple process
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Embodiment 1
[0022] The method steps of a kind of preparation method of metal pickling corrosion inhibitor are as follows:
[0023] (1). Preparation of hair hydrolyzate
[0024] Put animal hair in the hydrolyzer, then add hydrochloric acid solution, the ratio of hair and hydrochloric acid solution is: add 520ml of 35% hydrochloric acid solution per 100g of hair, and reflux and hydrolyze at 115°C for 12 hours;
[0025] (2). Preparation of corrosion inhibitor for metal pickling
[0026] With the 50ml hair hydrolyzate that the step (1) prepares, configure the organic corrosion inhibitor of 10ml quaternary ammonium salt, 10g urotropine and the inorganic corrosion inhibitor of 0.5gKI and the surfactant of 5mlOP, 2.5ml polyethylene glycol Mix the agent and stir to dissolve evenly.
Embodiment 2
[0028] The method steps of a kind of preparation method of metal pickling corrosion inhibitor are as follows:
[0029] (1). Preparation of hair hydrolyzate
[0030] Put animal hair in the hydrolyzer, then add sulfuric acid solution, the ratio of hair and sulfuric acid solution is: add 360ml of 70% sulfuric acid solution per 100g of hair, and reflux and hydrolyze at 100°C for 16 hours;
[0031] (2). Preparation of corrosion inhibitor for metal pickling
[0032] With the 50ml hair hydrolyzate prepared in step (1), configure 10ml quaternary ammonium salt, 10g urotropine organic corrosion inhibitor and 0.5gKI inorganic corrosion inhibitor and 5mlOP, 2.5ml polyethylene glycol surfactant Mix the agent and stir to dissolve evenly.
Embodiment 3
[0034] A preparation method of metal pickling corrosion inhibitor, the method steps are as follows:
[0035] (1). Prepare the mother liquor of the waste liquor for producing cystine
[0036] Place 600ml of cystine-producing waste liquid in a concentration tank, heat and evaporate, concentrate to 60% of the original volume, stop heating, and allow it to cool to room temperature, then filter it to remove crystallized ammonium chloride Wait for impurities, then adjust the pH to 4 with hydrochloric acid or sulfuric acid to remove the concentrated solution of impurities, and then prepare the mother liquor of the waste liquid for producing cystine;
[0037] (2). Preparation of corrosion inhibitor for metal pickling
[0038] The mother liquor of the 50ml that the step (1) is prepared produces the waste liquid of cystine, configure the organic corrosion inhibitor of 10ml quaternary ammonium salt, 10g urotropine and the inorganic corrosion inhibitor of 0.5gKI and 5mlOP, 2.5ml poly Gl...
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