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Acceleration test solution and method for detecting corrosion resistance of metallic substrate powder spraying part by adopting same

A technology of metal substrates and detection methods, which is applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of low-cost and fast testing of powder-sprayed products, long test cycle, and large errors, etc., to achieve The effect of reducing experiment cost, convenient operation and reducing maintenance cost

Inactive Publication Date: 2015-03-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the damp heat test and the salt spray test belong to the environmental acceleration test method, and the existing problem is that the test cycle is long on the one hand.
However, this method can only test regular sprayed test pieces, using a special electrochemical workstation, which is affected by the accuracy of equipment and instruments, and the error is very large
Unable to achieve low-cost and rapid testing of powder sprayed products

Method used

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  • Acceleration test solution and method for detecting corrosion resistance of metallic substrate powder spraying part by adopting same
  • Acceleration test solution and method for detecting corrosion resistance of metallic substrate powder spraying part by adopting same
  • Acceleration test solution and method for detecting corrosion resistance of metallic substrate powder spraying part by adopting same

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Experimental program
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Effect test

Embodiment 1

[0085] In this embodiment, according to the coating thickness of the metal base powder spraying parts, the metal base powder spraying parts with a coating thickness of 60 μm are marked as the first group, and the metal base powder spraying parts with a coating thickness of 100 μm are marked as the second group. Group, the metal matrix powder sprayed parts with a coating thickness of 150 μm are marked as the third group; and the surface of the metal matrix powder sprayed parts of the three groups is cleaned to make the surface free of dust and oil.

[0086] In the present embodiment, when preparing the accelerated test solution, the percentage by weight of each component is: 0.1% copper chloride: 3% sodium chloride: 0.5% surfactant: 96.4% deionized water, so that the accelerated test solution The pH value is 5.0, and the temperature is 75°C; then, divide the prepared accelerated test solution into three parts on average, and then immerse the three groups of metal substrate powde...

Embodiment 2

[0091] In the present embodiment, when preparing the accelerated test solution, the weight percentage of each component is: copper chloride 5%: sodium chloride 6.5%: surfactant 0.1%: deionized water 88.4%, the pH value of the accelerated test solution is 3.0, the temperature of the accelerated test solution is 20°C.

[0092] In this embodiment, the process of pre-treating the powder-sprayed parts of the metal base and the method of detecting whether the chemical reaction between the accelerated test solution and the powder-sprayed parts of the metal base are the same as those in Embodiment 1, and will not be repeated here.

[0093] Table 1 shows the color change of the surface of each group of powder-sprayed metal parts in this embodiment and the corresponding corrosion resistance evaluation results at different times.

Embodiment 3

[0095] When preparing the accelerated test solution in the present embodiment, the percentage by weight of each component is: copper chloride 0.3%: sodium chloride 5%: surfactant 0.5%: deionized water 94.2%, and the pH value of the accelerated test solution is 3.7 , the temperature of the accelerated test solution is 50°C.

[0096] In this embodiment, the process of pre-treating the powder-sprayed parts of the metal base and the method of detecting whether the chemical reaction between the accelerated test solution and the powder-sprayed parts of the metal base are the same as those in Embodiment 1, and will not be repeated here.

[0097] Table 1 shows the color change of the surface of each group of powder-sprayed metal parts in this embodiment and the corresponding corrosion resistance evaluation results at different times.

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Abstract

The invention discloses a method for rapidly detecting the corrosion resistance of a metallic substrate powder spraying part. The method comprises the following steps: fully wetting the surface of the metallic substrate powder spraying part with an acceleration test solution; detecting whether the acceleration test solution and the metallic substrate powder spraying part have a chemical reaction or not; if so, judging the corrosion resistance of the metallic substrate powder spraying part to be not qualified; if not, judging the corrosion resistance of the metallic substrate powder spraying part to be qualified. The detection method is simple in reaction principle, convenient to operate and good in universality; after the method is adopted, observation is carried out at any time, and the quality of the metallic substrate powder spraying part can be effectively monitored; the method is not limited by the size of the metallic substrate powder spraying part and the detection field, can be used for testing the corrosion resistance of metallic substrate powder spraying products in the production field or engineering field, is convenient, practical and short in test period, and can meet the demand for rapid detection of the corrosion resistance of the metallic substrate powder spraying products in industrial community in a state of batch production. The invention also provides the acceleration test solution used for the method.

Description

technical field [0001] The invention relates to the field of rapid detection of corrosion resistance of structural parts, in particular to an accelerated test solution and a method for detecting the corrosion resistance of powder-sprayed parts of metal substrates using the solution. Background technique [0002] Coating is currently the main method to protect metal materials and prevent corrosion widely used in various industries, among which organic coating is the most widely used. The main anti-corrosion mechanism of organic coatings is the barrier effect, which prevents erosive particles, water, oxygen and other harmful adsorbents from contacting the metal; in addition, many coatings add corrosion-inhibiting adsorbents or sacrificial anode-type adsorbents to the filler. To further improve the corrosion resistance; the good adhesion between the organic coating and the metal also plays a role in preventing metal corrosion. The degree of metal corrosion under the coating di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02
Inventor 武俊伟郑镇嵘袁微曹雷宋好强
Owner ZTE CORP
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