Preparation method of room-temperature passivation solution of cast iron cylinder
A preparation method and passivation solution technology, which is applied in the coating process of metal materials, etc., can solve the problems that cannot meet the passivation requirements of the cast iron cylinder film, and achieve the effects of eliminating heating equipment, saving energy, and excellent passivation performance
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Embodiment 1
[0012] A method for preparing a room temperature passivation solution for a cast iron cylinder, the passivation solution consists of the following components in terms of weight percentage: 13% phytic acid, 4% selenous acid, 0.5% ferrous sulfate, 3% sodium benzoate; 14% of ethanolamine, 2.5% of industrial sodium carbonate, 0.5% of bromic acid, 0.4% of benzotriazole, 2.5% of technical alcohol, 0.6% of isothiimidazolone, and the remainder of tap water; Dissolve the benzotriazole and isothiimidazolone for later use; add 1 / 2 amount of tap water into the reaction kettle, start the stirrer to stir at a speed of 300 rpm under normal temperature and pressure, and add Sodium benzoate, industrial sodium carbonate, phytic acid, triethanolamine, selenous acid, ferrous sulfate and bromic acid, then add the pre-dissolved benzotriazole and isothiimidazolone solution, and finally add the remaining 1 / 2 amount of tap water and continue to stir for 50 min.
Embodiment 2
[0014] A method for preparing a room temperature passivation solution for a cast iron cylinder, the passivation solution consists of the following components in terms of weight percentage: 15% phytic acid, 3% selenous acid, 1.5% ferrous sulfate, 2% sodium benzoate; 16% of ethanolamine, 1.5% of industrial sodium carbonate, 0.8% of bromic acid, 0.2% of benzotriazole, 3.5% of industrial alcohol, 0.4% of isothiimidazolone, and the remainder of tap water; the preparation method is: first use industrial alcohol Dissolve benzotriazole and isothiimidazolone for later use; add 1 / 2 amount of tap water into the reaction kettle, start the stirrer to stir at a speed of 400 rpm under normal temperature and pressure, and add Sodium benzoate, industrial sodium carbonate, phytic acid, triethanolamine, selenous acid, ferrous sulfate and bromic acid, then add the pre-dissolved benzotriazole and isothiimidazolone solution, and finally add the remaining 1 / 2 The amount of tap water, continue to sti...
Embodiment 3
[0016] A method for preparing a room temperature passivation solution for cast iron cylinders, the passivation solution consists of the following components in terms of weight percentage: 14% phytic acid, 3.5% selenous acid, 1.0% ferrous sulfate, 2.5% sodium benzoate; 15% of ethanolamine, 2.0% of industrial sodium carbonate, 0.65% of bromic acid, 0.3% of benzotriazole, 3.0% of technical alcohol, 0.5% of isothiimidazolone, the remainder of tap water; Dissolve benzotriazole and isothiimidazolone for later use; add 1 / 2 amount of tap water into the reaction kettle, start the stirrer to stir at a speed of 350 rpm under normal temperature and pressure, and add Sodium benzoate, industrial sodium carbonate, phytic acid, triethanolamine, selenous acid, ferrous sulfate and bromic acid, then add the pre-dissolved benzotriazole and isothiimidazolone solution, and finally add the remaining 1 / 2 The amount of tap water, continue to stir for 45min.
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