The standard post-weld care step for the mold interior after it has cooled is to:

The standard post-weld care step for the mold interior after it has cooled is to:

• A. Replace the mold with a new unit.
• B. Clean the inside of the mold with a soft bristle brush or soft cotton cloth.
• C. Repaint the interior surface.
• D. Decontaminate the exterior with a solvent.

Answer: (C)

After welding, the interior surface has been exposed to heat that can cause oxidation and damage to any existing coating. Repainting the interior provides a fresh, protective coating that guards against moisture, corrosion, and chemical attack during use. It also helps restore a smooth, uniform surface finish, which improves mold release and reduces the chance of residues sticking to rough spots. Replacing the mold is unnecessary for a routine weld; simply cleaning doesn’t restore the protective layer, and decontaminating the exterior doesn’t address interior protection. Use a heat- and chemically resistant coating that’s compatible with the mold material and cure it per specifications before putting the mold back into service.

After welding, the interior surface has been exposed to heat that can cause oxidation and damage to any existing coating. Repainting the interior provides a fresh, protective coating that guards against moisture, corrosion, and chemical attack during use. It also helps restore a smooth, uniform surface finish, which improves mold release and reduces the chance of residues sticking to rough spots. Replacing the mold is unnecessary for a routine weld; simply cleaning doesn’t restore the protective layer, and decontaminating the exterior doesn’t address interior protection. Use a heat- and chemically resistant coating that’s compatible with the mold material and cure it per specifications before putting the mold back into service.