Heat tint removal
Removing temper colors removes thermally induced chromium depletion at weld edges through chemical or mechanical methods to restore corrosion protection.
Physical-Chemical Mechanism of Action
Thermal processing of steels can lead to chromium depletion visible at the weld edges. This depletion reduces the corrosion protection capability of the material.
Metallurgical Relevance & Risks in Welding
If chromium depletion is not removed, it can lead to increased corrosion and thus earlier failure of the weld. This can be especially dangerous in humid environments or under chemical stress.
Workshop Practice & Instructions
Use a trained person with appropriate materials and equipment to remove heat tint. For chemical removal, it is important to apply the solution correctly and clean the material thoroughly after treatment. For mechanical removal (e.g., polishing), ensure even processing and avoid over-polishing, as this can damage the material.