How must oil or grease on a steel surface be treated prior to industrial surface prep?

• A. Clean the affected areas using solvent cleaning according to the SSPC-SP 1 standard.
• B. Rinse with soap and water.
• C. Scrub with a steel brush and water.
• D. Wipe with an oily solvent only.

Answer: (A)

Removing oil and grease from a steel surface before industrial surface preparation is essential to ensure proper coating adhesion. The best approach is solvent cleaning in accordance with SSPC-SP 1. This standard provides the approved solvents and methods to dissolve and remove oils and greases, with guidance on how to perform the cleaning and ensure the surface is dry and ready for the next steps. Using SSPC-SP 1 ensures the surface reaches a defined level of cleanliness so nothing will interfere with adhesion.

Other options don’t meet that requirement: soap and water often cannot fully remove oils; scrubbing with a steel brush and water can spread contaminants and may cause rust or leave residues; wiping with an oily solvent only leaves oil behind and doesn’t achieve the necessary cleanliness.