Preparation method of indigo carmine/cetyl trimethyl ammonium bromide corrosion inhibitor for 1045 carbon steel hydrochloric acid pickling solution
A technology of hexadecyltrimethylammonium bromide and sodium indigo disulfonate, which is applied in the field of preparation of sodium indigo disulfonate composite corrosion inhibitor, can solve the problems of limiting the application of indigo and difficulty in indigo, and achieves inhibition The effect of corrosion rate, low cost and broad application prospects
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Embodiment 1
[0023] (1) Measure 42.5 mL of analytically pure concentrated hydrochloric acid with a graduated cylinder, dilute it to 1 L with distilled water, and prepare an HCl corrosion solution with a solubility of 0.5 mol / L.
[0024] (2) First weigh 0.0047 g of analytically pure sodium indigo disulfonate and dissolve it in 100 mL of the 0.5 mol / L HCl solution in step (1), and add 0.0073 g of analytically pure hexadecyltrimethyl Ammonium bromide, analytically pure sodium indigo disulfonate and analytically pure cetyltrimethylammonium bromide in a molar ratio of 1:2, fully dissolved and left to stand for 2 hours, then used a 200 mL volumetric flask to prepare 0.5 mol / L HCl solution was used for constant volume, and 200 mL sodium indigo disulfonate / hexadecyltrimethylammonium bromide compound corrosion inhibitor was prepared, that is, a corrosion solution with a solubility of 0.00005 mol / L.
[0025] (3) At room temperature, the epoxy resin is encapsulated and the exposed area at one end is...
Embodiment 2
[0028] (1) Measure 42.5 mL of analytically pure concentrated hydrochloric acid with a graduated cylinder, dilute it to 1 L with distilled water, and prepare an HCl corrosion solution with a solubility of 0.5 mol / L.
[0029] (2) First weigh 0.0093 g of analytically pure sodium indigo disulfonate and dissolve it in 100 mL of the 0.5 mol / L HCl solution in step (1), and add 0.0146 g of analytically pure cetyltrimethyl Ammonium bromide, analytically pure sodium indigo disulfonate and analytically pure cetyltrimethylammonium bromide in a molar ratio of 1:2, fully dissolved and left to stand for 2 hours, then used a 200 mL volumetric flask to prepare 0.5 mol / L HCl solution was used for constant volume, and 200 mL sodium indigo disulfonate / hexadecyltrimethylammonium bromide compound corrosion inhibitor was prepared, that is, a corrosion solution with a solubility of 0.0001 mol / L.
[0030] (3) At room temperature, the epoxy resin is encapsulated and the exposed area at one end is 0.50...
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