Therefore most prefer to use this test
Therefore most prefer to use this test. A coating with a high degree of cohesive strength may appear to have worse adhesion. Pull off test is the most commonly used test. Both these degrees are taken into consideration to determine the test results. At an angle called the vertex the point of knife is used to lift up the coating from the material. . The test fails only at the weakest point. The force applied to pull of the stub or the force with which the stub withstood the pressure determines the test. Some of the well recognized methods for adhesion testers are knife test, tape test and pull off tests. The knife test is another method for adhesion testers. Coating is generally used for high engineering use and there are a number of methods through which we can determine as to how well has coating bonded to a substance. For engineering requirements and demands coatings are becoming very popular. There are two variants in this test: X cut tape test and cross hatch tape test. It...