Be it small scale paint workshop or large paint and plating companies, they all are working in a common interest of delivering good quality in reduced cost. Everything that surrounds us has a coating or plating. To reduce the cost of plating, the first step that has to be taken is to streamline the work process. Random application of plating or coating may lead to non-smooth surfaces and uneven finishes. It requires a lot of efforts to evaluate and measure the outcome of the process that is being incorporated. What is most important, is incorporating a testing process to assess the quality of the plating. For that matter, paint plating instruments can be installed, this eliminates the human involvement in the testing process.

To accomplish the goal of delivering high-quality plating at reduced cost, it is imperative to have knowledge of testing methods. With this, the operator can ensure that thickness of plating and coating is consistent. Whether the testing process is simple or complex, the paint and plating workshop should be ready to adapt the testing parameters and instruments.

To assess the quality of the plating, there are certain tests performed. In this post, we will discuss a few techniques.

Corrosion Resistance Test

To protect the metallic surface from corrosion, there is a protective coating on the metal. This could either be paint or plating. Both the techniques are very different from each other. Paint is just application of mastic composition that dries into a solid layer. Whereas, plating requires chemical treatment. For instance, gold plating on silver is done by the process of electroplating. This process is more resistant to corrosion than simple paint. Using a salt spray chamber, the metal specimen with paint or coating is put under severe conditions to test its ability to withstand salt laden fog.

Scratch Resistance Test

Any coating, be it paint or plating, is prone to scratches due to physical stress from the surroundings. Scratch hardness tester is used to assess how deep an external force impact the specimen to leave a scratch. Generally, there are more than one coating of the paint, for upper layers. On upper layers, the scratch would not do major impact. On the other hand, poor paint quality would allow the physical stress to have a deep impact on the paint. Sometimes, a minor scratch can lead to chipping off paint.

Cupping Test

Cupping tester is a paint plating instrument that allows checking the stretch ability of the paint due to depression caused by external physical force. This tester makes a dent on the test specimen. Visual analysis is done to see the behaviour of the paint due to dent.


For more information about paint testing instruments, contact us.