Evaluate the Crack resistance in Coating Layer

Evaluate the Crack resistance in Coating Layer

The Coating industry is one of the booming verticals nowadays. High-quality coating is becoming the foremost choice of every manufacturer. Due to the multiple benefits it delivers, coated metal components are preferred by production units. However, quality standards are a must when it comes to selection. There are several quality tests which set the standards worldwide. Among them, a very basic test termed as Coating Bend test is often carried out. It is performed using a precise equipment designed as per the Bending test requirements.

The coating bend test is conducted to evaluate the resistance of a coating against crack formation. It is often seen that the metal sheets are bent in order to fulfil machine design requirement. During the applied bending stress, a coating must not deform and crack. It should deliver maximum amount of resistance. This property is very useful during the selection of coating paint.

Conical Bending Mandrel is a simple testing instrument which is used to test the stretching quality of coating layer. It bends the specimen using a conical shaped mandrel so that the user can inspect any crack generated on the coating. Although it appears very basic, the conical bending test is a vital part of the paint and coating industry. The device complies with ISO 6860 and ASTM D522. It evaluates the resistance of a coating to cracks; its elasticity, elongation or detachment property from a metal specimen. It is commonly used for estimating the behaviour of a coating layer under bending stress.

The equipment is a table-top model for user-friendly operations. The conical mandrel and the pivoted pressure roller run parallel to the surface of the cone. A cam lever is equipped in the clamping portion to ensure rapid and easy transformation of the specimen. In the test, a coated metal sheet is kept in the instrument and locked using the clamping segments. Using the lever handle, user can bend the specimen over the cylindrical rod and inspect visually if the sample generated any cracks.

Diameter of the Conical Cylinder is 3.1 mm and 38 mm. The maximum sample thickness must be 0.8 mm. An inbuilt measuring scale is available with the machine.