Before attempting corrosion removal, what should be cleaned from affected areas using a mild solvent such as Prepsol or Wax and Grease Remover?

• A. Paints, waxes, greases, oils and other Substances
• B. Only paints
• C. Only greases
• D. Only oils

Answer: (A)

Cleaning all surface contaminants before corrosion removal is essential because any residue on the metal can hide underlying corrosion and interfere with subsequent treatment. A mild solvent like Prepsol or Wax and Grease Remover is used to strip away coatings and contaminants without attacking the metal. Therefore, all paints, waxes, greases, oils and other substances should be removed from the affected areas. Paints can conceal corrosion and block inspection; waxes and greases create barriers that prevent cleaners from reaching the metal; oils can leave films that affect subsequent treatments and inspections. If only one type is removed, other contaminants remain and the corrosion removal process won’t be effective. So a complete cleaning of all these residues ensures the true condition of the surface is exposed and the process can proceed properly.