The use of the surface hardness test according to Wilborn-Wolff is essential to ensure a high-quality coating on metal parts. Let’s find out more about this essential tool for assessing the hardness of coatings.
What is the surface hardness test for painting?
The surface hardness test according to Wilborn-Wolff, also called scratch resistance test, is a method used to evaluate the hardness of the painted surface of metal parts. The test is performed using the hardness of a pencil.
The pencil leads, which have a well-graded hardness ranging from 6B to 9H (a set of 17 pencils), act as a “thermometer” for coating strength.
The surface hardness test according to Wilborn-Wolff is essential to ensure the quality of the coating of metal parts. Indeed, a paint that is too soft or too hard can cause adhesion or scratch resistance problems.
The pencil is inserted into a special instrument, simply called the Wolff-Wilborn scratchability test apparatus, which places them in a position with an inclination of 45°; at this point, the pencil is pressed onto the coating with a force slightly less than that required to break it. The hardness and resistance to scratching will then be indicated by the type of lead that will not damage the tested surface.
Thanks to the surface hardness test, it is possible to evaluate the hardness of the paint and guarantee the highest quality of the work performed. The standard that regulates it is UNI EN ISO 15184:2020.
The importance of an internal laboratory
Our internal laboratory is equipped with state-of-the-art instruments, including the necessary to perform the surface hardness test according to Wilborn-Wolff.
Thanks to the use of dedicated tools and the experience of our staff, we are able to guarantee a high quality painting, with an optimal surface hardness for each type of article.
Our company is constantly committed to improving the quality of the work performed, using the best technologies and tools available on the market. The surface hardness test according to Wilborn-Wolff is just one of several tests that we use to ensure the highest quality of the painting of the parts.
Our goal is to best satisfy the customer’s needs, offering a personalized and tailor-made service.
Conclusions
The surface hardness test according to Wilborn-Wolff is a fundamental method for evaluating the paintwork. Relying on a third-party painting supplier equipped with cutting-edge tools to perform the surface hardness test means choosing a reliable and competent partner, able to guarantee the highest quality of the work performed.
The coating processes require great attention to detail and the use of specific tools to ensure the highest quality of the work performed. Contact us to find out more about our contract painting services and related tests.