What is the waterbreak test?
The water break test is a simple test and is used to determine whether a surface has been properly cleaned before it is treated in an electroplating bath or chemically blackened or anodised.
It is a way to check if there are any remaining traces of grease, oil or other contaminants on the surface that can prevent the new metal or conversion layer from adhering properly. The photo clearly shows the separation between a clean and a dirty surface. An even film of water is a sign of a clean surface, the droplets indicate that the part of copper is still contaminated.
Why do you need to perform the water break test?
Obtaining a good connection between, for example, the metal to be applied, such as copper or zinc, and the substrate is crucial for a flawless finish. When objects are handled, skin oils and other contaminants can get on the surface, which can lead to dull patches or other disturbances on the surface, ruining the appearance. Additionally, the new layer may not adhere properly if contaminants are present on the surface, which can lead to peeling or bubbles.
The importance of a clean surface
Performing the water break test is necessary to ensure that the surface is completely free of contaminants before further treatment. A clean surface is important for achieving a smooth and shiny finish. Even if an object appears clean, it is important to perform the water break test to ensure that all traces of grease and oil have been removed.
How to perform the waterbreak test
Performing the water rupture test is easy. First, take the object you want to work on and spray water over it or submerge it. Observe how the water behaves on the surface. If the water is in a thin film over the surface without interruptions, the object is free of contamination and grease. If the water dissipates, breaks up, forms droplets, or doesn’t cover the entire object, it means that contaminants are still present on the surface and need to be thoroughly cleaned or degreased one more time before continuing with the process.