Testing medium residues
Test material residues are chemicals or particles that remain on the component surface after testing procedures. These must be removed before welding to avoid contamination.
Physical-Chemical Mechanism of Action
Residues from testing agents are chemical substances or mechanical particles that remain on the component surface during testing procedures. They can come from the testing agents themselves or from the surroundings.
Metallurgical Relevance & Welding Risks
If testing agent residues are not removed, they can affect the quality and behavior of the weld. They can cause corrosion, shorten the component's service life, or lead to uneven hardness distribution, which can cause cracks and fractures.
Shop Practice & Action Guidelines
Before welding, all testing agent residues must be carefully removed. This can be done by cleaning with water, chemical cleaners, or mechanical methods like grinding. It's important that the surface is completely clean to ensure no contaminants affect the welding.