Variable Height Impact Test

Surface coatings are frequently subjected to impact and shock loads which deform the
base material, thus placing stress on the adhesion and cohesion of the coating.

ERICHSEN Impact Tester 304 are used for determination of impact resistance,
deformability and tensibility of coatings and substrates as well as adhesion of the coatings.
The ball impact test simulates this type of stress under standardised conditions.
A ball punch of defined weight the bottom of which is of fixed diameter, is dropped freely
down a guide tube from an agreed or variable height.

In this case a defined weight, which sample-side end is formed as hemispherical head
(ASTM and ISO-1) or as male die tappet with fixed diameter, is dropped freely down a
guide tube from an agreed or variable height.

After the impact, the deformed zone of the specimen surface is examined for cracks and flaking.
The ball impact test is comparable to a dynamic version of the ERICHSEN Cupping Test.

Standards:

• ASTM D 2794
• ISO 6272-2
• ISO 6272-1