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Cast iron cylinder room-temperature passivation technology

A cylinder and process technology, applied in the field of passivation process at room temperature, can solve the problems that cannot meet the passivation requirements of the cast iron cylinder film, and achieve the effects of eliminating heating equipment, excellent passivation performance, and easy operation

Inactive Publication Date: 2014-12-31
WUXI LUOSHE TECH VENTURE
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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

[0013] A room temperature passivation process for cast iron cylinders, the passivation solution used in the process 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 industrial alcohol, 0.6% of isothiimidazolone, and the remainder of tap water; the passivation process is as follows: Prepare the passivation solution, put it in the passivation tank, dilute it twice, then pour it into the sprayer, spray passivation on the surface of the machined cast iron cylinder, spray a layer, wait for it to dry naturally, and then spray Once, repeat this process 4 times.

Embodiment 2

[0015] A room temperature passivation process for cast iron cylinders, the passivation solution used in the process 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 passivation process is as follows: Prepare the passivation solution, put it in the passivation tank, dilute it 8 times, then pour it into the sprayer, spray passivation on the surface of the machined cast iron cylinder, spray a layer, wait for it to dry naturally, and then Spray once and repeat this process 2 times.

Embodiment 3

[0017] A room temperature passivation process for cast iron cylinders, the passivation solution used in the process consists of the following components in terms of weight percentages: phytic acid 14%, selenous acid 3.5%, ferrous sulfate 1.0%, sodium benzoate 2.5%; 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, and the remainder of tap water; the passivation process is as follows: Prepare a passivation solution, put it in a passivation tank, dilute it 7 times, then pour it into a sprayer, spray passivation on the surface of the machined cast iron cylinder, spray a layer, wait for it to dry naturally, and then Spray once and repeat this process 3 times.

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Abstract

The invention discloses a cast iron cylinder room-temperature passivation technology. A passivation liquid used by the cast iron cylinder room-temperature passivation technology comprises, by weight, 13-15% of phytic acid, 3-4% of seleninic acid, 0.5-1.5% of ferrous sulphate, 2-3% of sodium benzoate, 14-16% of triethanolamine, 1.5-2.5% of industrial sodium carbonate, 0.5-0.8% of bromic acid, 0.2-0.4% of benzotriazole, 2.5-3.5% of industrial alcohol, 0.4-0.6% of isothia-imidazolone and the balance tap water. The cast iron cylinder room-temperature passivation technology comprises the following steps of preparing the passivation liquid from the above components, putting the passivation liquid into a passivation tank, diluting the passivation liquid by 6-8 times, pouring the diluted passivation liquid into a sprayer, carrying out spraying passivation on the surface of the processed cast iron cylinder, naturally drying the sprayed layer in air, carrying out spraying again and repeating the spraying process 2-4 times.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a room-temperature passivation process of 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 suitable for various spraying an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/50C23C22/62C23C22/68
Inventor 高忠清
Owner WUXI LUOSHE TECH VENTURE
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