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

Inactive Publication Date: 2014-12-24
无锡杨市表面处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It still cannot meet the film passivation requirements of cast iron cylinders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a preparation method of a room-temperature passivation solution of a cast iron cylinder. The preparation method comprises the following steps: firstly, dissolving 0.2%-0.4% of benzotriazole and 0.4%-0.6% of isoimidazolone by using 2.5%-3.5% industrial alcohol for later use; adding 1 / 2 of running water to a reaction kettle; starting a stirrer to stir at the speed of 300-400 r / min at normal temperature and pressure; sequentially adding 2%-3% of sodium benzoate, 1.5%-2.5% of industrial sodium carbonate, 13%-15% of phytic acid, 14%-16% of triethanolamine, 3%-4% of seleninic acid, 0.5%-1.5% of ferrous sulfate and 0.5%-0.8% of bromic acid, and then adding benzotriazole and isoimidazolone solution, which is dissolved in advance; and finally adding the residual 1 / 2 of running water, and stirring for 40-50 minutes, wherein the content of the components is the final content of the passivation solution.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a method for preparing a room temperature passivation solution for a cast iron cylinder. Background technique [0002] Metal passivation treatment is an important part of metal surface engineering. The essence of metal passivation treatment is to carry out chemical reactions in the corresponding treatment liquid under the specified process conditions and process parameters to form a chemical conversion film on the surface, also known as passivation. membrane. The passivation film should not only give the metal surface a certain degree of protection and decoration, but also prevent the corrosion of the metal surface by the corrosive medium in the atmosphere. In the transfer process, the metal workpiece must meet the technical requirements of the passivation film layer equivalent to the conventional phosphating film layer before spraying and painting, and must be suitabl...

Claims

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Application Information

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IPC IPC(8): C23C22/50
Inventor 潘增炎
Owner 无锡杨市表面处理科技有限公司
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