Effect of protecting coatings on mechanical properties of metal surfaces

The effects of epoxy-polyester based powder coatings on the mechanical properties plates made rolled steel sheets were investigated in this work. effect order 100 µm thickness specimens 0.7-1.5 mm thick was considered. Tests carried out at room and elevated temperatures showed that thin had an insignificant bend tensile tests. In particular, bending stiffness is virtually unchanged presence coatings, despite fact modulus elasticity determined tests with always somewhat lower than Young's steel, due to increased coatings. compression strength tests, contrary, influence significant. overcritical mode deformation, load carrying capacity coated significantly reduced their critical stability loss becomes 1.2-2.3 times (depending substrate thickness) compared uncoated samples. This can be explained by residual temperature stresses arise samples after coating.