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Surface corrosion prevention technique for metal sample

A sample and metal technology, applied in the field of surface anti-corrosion technology of metal samples, can solve the problems of poor adhesion of film substrate and long processing time, and achieve the effect of increasing service life, simple operation and simple process

Inactive Publication Date: 2017-01-04
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the rare earth conversion coating technology is mainly immersion treatment, which is simple to operate and easy to maintain; but its disadvantages are that the long-term immersion process takes too long to form a thin film layer and poor adhesion to the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A surface anticorrosion process for metal samples, through the steps of degreasing, first water washing, pickling, second water washing, third water washing, surface adjustment process, phosphating process, fourth water washing and hot water washing, to complete the surface anticorrosion process of metal samples ;Specific steps are as follows:

[0021] (1) Degreasing: Add 700L of clear water into the clear water tank and heat to 40°C; then add 20Kg of strong alkali degreasing agent into the clear water tank and dissolve while stirring, then add clear water to 1000L and heat to 55 ℃, put the metal sample into the clear water tank for 10min;

[0022] (2) The first water washing: Put the degreased metal sample into the washing tank, which is tap water, put the degreased metal sample into the washing tank at room temperature, and soak for 1 min;

[0023] (3) Pickling: Mix hydrochloric acid and water to prepare a pickling solution, and immerse the metal sample after the fir...

Embodiment 2

[0031] A surface anticorrosion process for metal samples, through the steps of degreasing, first water washing, pickling, second water washing, third water washing, surface adjustment process, phosphating process, fourth water washing and hot water washing, to complete the surface anticorrosion process of metal samples ;Specific steps are as follows:

[0032] (1) Degreasing: Add 800L of clear water into the clear water tank and heat to 40°C; then add 20Kg of strong alkali degreasing agent into the clear water tank and dissolve while stirring, then add clear water to 1000L and heat to 65 ℃, put the metal sample into the clear water tank and immerse for 15min;

[0033] (2) The first water washing: Put the degreased metal sample into the washing tank, which is tap water, put the degreased metal sample into the washing tank at room temperature, and soak for 1 min;

[0034] (3) Pickling: Mix hydrochloric acid with water to prepare a pickling solution, and immerse the metal sample ...

Embodiment 3

[0042] A surface anticorrosion process for metal samples, through the steps of degreasing, first water washing, pickling, second water washing, third water washing, surface adjustment process, phosphating process, fourth water washing and hot water washing, to complete the surface anticorrosion process of metal samples ;Specific steps are as follows:

[0043] (1) Degreasing: Add 750L of clear water into the clear water tank and heat to 40°C; then add 20Kg of strong alkali degreasing agent into the clear water tank and dissolve while stirring, then add clear water to 1000L and heat to 59 ℃, put the metal sample into the clear water tank and immerse for 12min;

[0044] (2) The first water washing: Put the degreased metal sample into the washing tank, which is tap water, put the degreased metal sample into the washing tank at room temperature, and soak for 1 min;

[0045] (3) Pickling: Mix hydrochloric acid with water to prepare a pickling solution, and immerse the metal sample ...

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PUM

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Abstract

The invention discloses a surface corrosion prevention technique for a metal sample. The surface corrosion prevention technique for the metal sample comprises the steps of degreasing, washing for the first time, pickling, washing for the second time, washing for the third time, a surface adjustment process, a phosphorization process, washing for the fourth time and washing with hot water, and thus the surface corrosion prevention technique of the metal sample is completed. According to the step of degreasing, 700-800 L of clear water is added into a clear water tank and heated to the temperature of 40 DEG C; and then 20 Kg of an alkaline degreasing agent is added into the clear water tank and dissolved while being stirred, clear water is added again till the volume of the clear water reaches 1000 L, the temperature is increased to 55-65 DEG C, and the metal sample is placed in the clear water tank to be soaked for 10-15 min. The surface corrosion prevention technique for the metal sample has the advantages that operation is easy, the technique is simple, energy saving and environmental friendliness are achieved, and toxicity and harm are avoided; and in addition, by additionally conducting the surface adjustment process and the phosphorization process, the corrosion resistance of the metal sample is greatly improved, and the service life of the metal sample is prolonged.

Description

technical field [0001] The invention belongs to a metal sample surface treatment process, in particular to a metal sample surface anticorrosion process. Background technique [0002] In modern industry and daily life, metal corrosion can be seen everywhere, especially in the form of crevice corrosion, stress corrosion and corrosion fatigue in the storage containers of fuel oil and hazardous chemicals, which cause great safety hazards to people's lives. [0003] The metal protection methods currently used can be roughly divided into three categories: one is anodic oxidation treatment, that is, an anodic oxidation film with a thickness of tens of microns is formed on the metal surface, but due to the large energy consumption of the anodic oxidation process and the contamination of the electrolyte solution Serious, difficult to handle, and its application is limited; the second type is chemical conversion coating, that is, soaking metal parts in a solution of a certain composit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/73
CPCC23C22/73
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH