Non-destructive measurement of coating adhesion

Adhesive strength of powder coated aluminium substrates

“…Therefore, achieving good wet adhesion of organic coatings is an important factor in corrosion protection. Whilst agreeing with the previous studies, others argued [9][10][11] that there does not appear to be a direct relationship between adhesion strength and water resistance, or adhesion strength and corrosion protection.…”

Experimental design to enhance the surface appearance, the internal structure, and the shear stresses of injected and metallized polycarbonate/acrylonitrile–butadiene‐styrene parts

“…Another defect caused by higher T mo was the poor adhesion the tensile (A) and (B) metallized specimens surface causing holes with a depth of 168.3 μm (Figure ). Several authors explained this coating adhesion failure by various internal or external forces. These include mechanical stress and environment induced thermal stress.…”

“…Figure exhibits other defects caused by t c above 25 s such as poor adhesion of tensile (A) and (B) metallized specimens surface. Several studies explained these defects by the existence of an inadequate bond between the individual coats called the intercoat adhesion. In other words, they would be clear evidence of the conflicting internal or external forces such as the mechanical stress and the environment‐induced thermal stress.…”

“…Indeed, despite the noticeable progress in improving the quality of PC/ABS products, which have attracted the consumers because of their esthetic presentation, lightweight, and cost effectiveness, industrialists are still dissatisfied because of high rate of rejection due to defects in the surfaces of the injection‐molded parts . The most frequently reported defects were scratch, weld line, blister, moisture streaks, poor adhesion, burn marks, sink marks, flow marks, and shrinkage . In order to remedy these short comings, Lim and Park investigated the effect of the injection‐molding temperature on the mechanical properties and morphology at the weld line of 60/40 (w/w)PC/ABS blend and reported that the injection‐molding temperature has an effect on the mechanical strength of the welded specimen.…”

Advances in test and measurement of the interface adhesion and bond strengths in coating-substrate systems, emphasising blister and bulk techniques

“…The adhesion strength measurements carried out can provide guidelines on both the design and choice of better coating methods, as well as material pairs for a good coating-substrate system. Graystone and Kennedy [1] have previously reviewed a range of non-destructive techniques for coating adhesion detection and analysis. They proposed that if only a minimum localized coating or substrate were destroyed or ruptured during the testing process, the method was effectively a type of non-destructive testing (NDT) technique.…”