Certification of coatings
The main subjects of R&D refer to the choice of hardening technology to increase service life of a particular product or create functional coatings on its surface.
Approximate plan of certification of coatings
- analysis of domestic and international experience in solving the task;
- alternative choice of hardening technologies (2-3 variants are optimal);
- study of properties of the modified surface using selected technologies on witness samples;
- optimizing hardening technology on the basis of experimental and statistical research;
- performing model tests of hardened products;
- industrial testing of lots of hardened products (full-scale tests);
- economic justification.
Used methods of study and certification of coatings
|
Property |
Method of study |
|
Thickness of modified layer or coating |
Calotest, ellipsometry, profilometry, microscopy |
|
Adhesion of coating |
Scratch Test, Rockwell Cone Impact, Tear Test |
|
Physical and mechanical properties (hardness, modulus of elasticity, elastic recovery) |
Instrumental indenting |
|
Tribological properties (coefficient of friction, wear parameters, running-in time, heat release in friction) |
Tribometry |
|
Microabrasive wear parameters |
TriboCalotest |
|
Volumetric strength properties |
Tensile tests |
|
Adhesion of lubricant (oil retention) |
Measurement of adhesion energy, rapid analysis of surface tension |
|
Residual stresses |
Using the resistive electrocontact method |
|
Coating thickness |
Anodic polarization, microscopy |
|
Roughness |
2D and 3D profilometry |
|
Dielectric properties of coatings |
Measurement of electrical characteristics of the surface layer |
|
Microstructure, element and phase composition, morphology, topography and nanoprofilometry |
Raster (scanning) and transmission electron microscopy, scanning electron microscopy with X-ray spectral analysis, scanning (atomic force) probe microscopy, BFE electron spectroscopy, X-ray phase analysis, infrared spectroscopy, X-ray fluorescence spectroscopy |
Equipment for the attestation of coatings
