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Anti-corrosion preprocessing method of engineering machinery oil tank

A kind of construction machinery and pretreatment technology, applied in the direction of metal material coating process, etc., can solve the problems of affecting the cleanliness of hydraulic oil, unstable protection quality, and damage of hydraulic system, and achieve enhanced corrosion resistance, stable quality, and cleanliness Improved effect

Inactive Publication Date: 2017-12-12
安徽雷萨重工机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many hydraulic systems used in construction machinery, and it is necessary to provide oil for the hydraulic system, that is, hydraulic oil. Then the parts that store the oil are called oil tanks. The oil pipes are used to provide oil for the hydraulic system. Carry out antirust treatment on fuel tanks and oil pipes. Traditional antirust treatment uses technological processes such as pickling to remove rust, neutralization, and sodium nitrite aqueous solution protection. Due to the influence of acid concentration and ambient temperature, the quality of protection is unstable. The remaining oxides are brought into the hydraulic system, affecting the cleanliness of the hydraulic oil and causing damage to the failure of the hydraulic system

Method used

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  • Anti-corrosion preprocessing method of engineering machinery oil tank

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Effect test

Embodiment 1

[0016] An anti-corrosion pretreatment method for an engineering machinery oil tank, comprising the following steps:

[0017] (1) Put the finished product of the formed oil tank into a degreasing agent solution with a concentration of 3%, heat it to 35°C and soak it in the bath for 30 minutes, then take it out and rinse it with clean water;

[0018] (2) Then soak the degreased primary product of the oil tank in a descaling solution with a temperature of 60°C and a weight ratio of 1:7 for 40 minutes, then take it out and dry it;

[0019] (3) Put the finished product of the oil tank after drying into the phosphating pool with a temperature of 94°C for treatment; the phosphating solution in the phosphating pool is made according to the following dosage ratio: ferrous dihydrogen phosphate 13g / L, dihydrogen phosphate Manganese hydrogen 15g / L, manganese nitrate 15g / L, nickel nitrate 1g / L, the balance is water;

[0020] (4) Carry out passivation treatment at 70°C for 15 minutes, and ...

Embodiment 2

[0024] An anti-corrosion pretreatment method for an engineering machinery oil tank, comprising the following steps:

[0025] (1) Put the formed fuel tank primary product into a degreasing agent solution with a concentration of 5%, heat it to 40°C and soak it for 40 minutes, then take it out and rinse it with clean water;

[0026] (2) Then soak the degreased primary product of the fuel tank in a descaling solution with a temperature of 65°C and a weight ratio of 1:7 for 50 minutes, then take it out and dry it;

[0027] (3) Put the first finished product of the oil tank after drying into the phosphating tank with a temperature of 98°C for treatment; the phosphating solution in the phosphating tank is made according to the following dosage ratio: ferrous dihydrogen phosphate 18g / L, dihydrogen phosphate Manganese hydrogen 20g / L, manganese nitrate 18g / L, nickel nitrate 3g / L, the balance is water;

[0028] (4) Carry out passivation treatment at 85°C for 15 minutes, and passivation ...

Embodiment 3

[0032] An anti-corrosion pretreatment method for an engineering machinery oil tank, comprising the following steps:

[0033] (1) Put the formed fuel tank primary product into a degreasing agent solution with a concentration of 4%, heat it to 38°C and soak it for 35 minutes, then take it out and rinse it with clean water;

[0034] (2) Put the degreased primary product of the oil tank into the descaling solution with a temperature of 63°C and a weight ratio of 1:7 for 45 minutes, then take it out and dry it;

[0035] (3) Put the finished product of the oil tank after drying into the phosphating pool with a temperature of 96°C for treatment; the phosphating solution in the phosphating pool is made according to the following dosage ratio: ferrous dihydrogen phosphate 15g / L, dihydrogen phosphate Manganese hydrogen 18g / L, manganese nitrate 17g / L, nickel nitrate 2g / L, the balance is water;

[0036] (4) Carry out passivation treatment at 80°C for 15 minutes, and passivation solution ...

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Abstract

The invention discloses an anti-corrosion preprocessing method of an engineering machinery oil tank. The method comprises the following steps: after the steps of degreasing, derusting, phosphating treatment and passivation treatment, saponification is performed on the oil tank, so that the thickness of a phosphating layer on the surface of the oil tank is uniform, wherein the thickness of the phosphating layer is 2-3 microns, and the surface of the phosphating layer is in the color of bright silver. The surface performance of the oil tank changes after phosphatization, the corrosion resistance is enhanced, and the quality is stable. The corrosion resistance of a rust-proof phosphating film is far beyond the corrosion resistance of an oxidation film of a metal part, and the size of the rust-proof phosphating film does not change, mainly because part of the metal is dissolved in a phosphating solution during formation of the phosphating film, the oil tank cannot be oxidized or corroded in the follow-up use process, no oxidation impurities exist in an oil liquid, and the cleanliness of the oil liquid is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of metal treatment and anti-corrosion, and in particular relates to an anti-corrosion pretreatment method of an engineering machinery oil tank. Background technique [0002] The function of the hydraulic system is to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely power components, executive components, control components, auxiliary components (accessories) and hydraulic oil. [0003] The quality of a hydraulic system not only depends on the rationality of the system design and the performance of the system components, but also because of the pollution prevention and treatment of the system. The pollution of the system directly affects the reliability of the hydraulic system and the service life of the components. According to According to statistics, about 70% of hydraulic system failures at home and abroad are caused by pollution. [0004] There are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/73
CPCC23C22/73
Inventor 陶小飞
Owner 安徽雷萨重工机械有限公司
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