Answer :
Final answer:
The correct visual standards for abrasive blasting are ISO 8501-1, ISO 8502, and ISO 8503, detailing the conditions for surface cleanliness and roughness.
Explanation:
The visual standards for abrasive blasting are defined in ISO 8501-1, ISO 8502, and ISO 8503. These standards are widely used in the industry to assess the cleanliness and roughness of a surface before, during, and after abrasive blasting processes. ISO 8501-1 provides the grades of rust removal and general surface cleanliness, ISO 8502 covers tests for the assessment of surface cleanliness, and ISO 8503 relates to the profile of the blasted surface.
The options presented, such as SSPC-SP numbers and ASTM standards, cater to different aspects and materials in surface preparation and coating but do not specifically address the visual standards for abrasive blasting as directly as the ISO series does.