What are the scratch test standards? Judgment of scratch severity

Date：2023-05-08 16:42:00Views：572

Scratch testing is a widely used method for testing the surface wear resistance of materials, and therefore has become an important factor in evaluating material quality. The standards for scratch testing include wear testing, scratch testing, friction testing, etc. Through scratch testing, the hardness and wear resistance of the material surface, as well as the effects of surface treatment, can be determined. If you are interested in the upcoming content, please continue reading the following text, hoping it can be helpful to you.

Currently, the commonly used scratch testing standards include the following:

ASTM E-112: This is an internationally recognized scratch test standard that mainly evaluates the scratch resistance of vehicle surfaces. This standard uses a testing tool similar to a scraper to scratch and record the depth and area of the scratch on the surface of the vehicle body to evaluate its durability.

ISO 22466: This is a standard developed by the International Federation of Automobile Manufacturers (FIA), mainly used for scratch resistance testing of racing car body surfaces. This standard uses a testing tool similar to a steel brush to brush the surface of the vehicle to evaluate its scratch resistance.

ASTM D422: This is a scratch test standard for metal plate surfaces, mainly evaluating the scratch resistance of metal surfaces. This standard uses a testing tool similar to a steel brush, which is used to brush metal surfaces to record the depth and area of scratches and evaluate the durability of the metal surface.

The commonly used scratch testing methods for components mainly include the following:

Pencil hardness testing method: This method is a simple and effective method for testing the surface hardness of components, usually using a pencil with a hardness level of 3H or 4H for testing.

Scratch test method: Use a metal wire pressed on the surface of the test piece or a plastic blade with higher hardness to scratch the surface of the component to test its scratch resistance.

Sandpaper friction test method: Use sandpaper materials with different particles to conduct friction tests on the surface of components and evaluate their wear resistance.

Friction wheel testing method: This method is an effective means of testing the wear resistance of the surface of components. A specific friction wheel is used for testing under a certain load and speed to evaluate the wear resistance of the surface of components.

Friction coefficient testing method: Evaluate the wear resistance and scratch resistance of components by testing the friction coefficient on their surfaces using universal material testing machines or multifunctional material testers.

How to determine the severity of scratches?

The severity of scratches can be determined by observing the shape, size, and depth of the scratches with the naked eye. Evaluating the depth of scratches is an important indicator of the severity of scratches, usually measured using instruments such as microscopes or scanning electron microscopes. In addition, users can measure the severity of scratches based on physical quantities such as their length and diameter.

The above is an introduction to scratch testing. If you have any needs in this regard, please feel free to consult Chuangxin Testing! Scratch testing is an important method for evaluating the surface wear durability of materials. Choosing different scratch testing standards and methods based on application scenarios is of great significance for evaluating material quality and optimizing surface treatment.