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Method for measuring elastic modulus of coating

An elastic modulus and coating technology, applied in the field of measuring the elastic modulus of coatings, can solve problems such as the inability to use measurement, and achieve the effects of convenient and quick test efficiency, simple and easy process, and high test efficiency.

Active Publication Date: 2017-02-08
CHINA TEST & CERTIFICATION INT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the coating is usually very thin, it is not possible to directly measure the elastic modulus of the coated sample by the pulse excitation technique

Method used

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  • Method for measuring elastic modulus of coating
  • Method for measuring elastic modulus of coating
  • Method for measuring elastic modulus of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: the measurement of single-layer metal coating elastic modulus

[0047] The coating sample to be tested is a NiCr coating prepared by supersonic flame spraying on the Q235 low-carbon steel substrate. The oxidizing gas is air and nitrogen respectively, and the spraying distance is 200mm. Before the preparation of the coating, the substrate materials are degreased and derusted, and the surface of the substrate is sandblasted with a particle size of 60 mesh brown corundum, an air pressure of 0.4-0.6MPa, a blasting angle of 45°, and a blasting distance of 160mm-180mm. After sandblasting, use acetone ultrasonic cleaning to remove impurities such as residual sand particles on the surface to ensure the bonding strength between the coating and the substrate. The cross-sectional morphology of the single-layer coating sample is shown in Figure 2, where 2a is the NiCr alloy coating obtained by atomizing gas as air; 2b is the NiCr alloy coating obtained by atomizing g...

Embodiment 2

[0059] Embodiment 2: the measurement of elastic modulus of multi-layer coating

[0060] For the measurement of the elastic modulus of multi-layer coatings, take the coating sample (coating 1+coating 2+substrate) of the two-layer coating as an example, first of all, it is regarded as the surface coating (that is, the outermost The test coating sample of the single-layer coating composed of coating, coating 1) and the remaining part (substrate+coating 2), is measured according to the steps of the test coating sample of the single-layer coating, and can be measured Elastic modulus E of surface coating (coating 1) q1 ; After the surface coating (coating 1) is removed, the remaining part (coating 2+substrate) is measured as a new coating sample to be tested, and the elastic modulus E of coating 2 can be measured q2 . According to this idea, the measurement of the elastic modulus of more layers of coatings can be realized.

[0061] The sample selected in the experiment is a comme...

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Abstract

The invention discloses a method for measuring the elastic modulus of a coating. When the coating is a single-layer coating, the method comprises the following steps: acquiring the elastic modulus Eq of a coating composite sample to be measured; acquiring the elastic modulus Es of a matrix material of the coating sample to be measured; respectively acquiring the thickness H of the matrix of the coating sample to be measured and the thickness h of the coating; and calculating the elastic modulus Ec of the coating of the coating sample to be measured according to a formula shown in the description, wherein A in the formula is h<4>, B in the formula is 4EsHh<3> + 4EsH<3>h + 6EsH<2>h<2> - Eq(H+h)<3>h, and C in the formula is Es<2>H<4> - EqEsH(H+h)<3>. The method uses a pulse excitation technology to realize rapid and accurate measurement of the elastic modulus of the coating sample.

Description

technical field [0001] The invention relates to the technical field of coating mechanical performance evaluation, in particular to a method for measuring the elastic modulus of a coating. Background technique [0002] Coating technology is an important modern surface treatment technology and material composite technology. The composite formed by the coating and the substrate can make them complement each other in performance. For example, compounding one or more layers of ceramic coating on the metal surface can make the composite Components have the advantages of high temperature resistance, wear resistance and corrosion resistance of ceramic materials, and are widely used in petrochemical, national defense, aerospace, mechanical and electronic fields. Coating materials have excellent mechanical, physical and chemical properties, and are mainly divided into anti-corrosion coatings, wear-resistant coatings, and special functional coatings, which can improve the performance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/00G01N33/0096
Inventor 包亦望聂光临万德田
Owner CHINA TEST & CERTIFICATION INT GRP CO LTD
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