Acceptance criteria for the anti-corrosion coating using conventional anti-corrosion paint (requiring metal surface sandblasting to Sa2.5 level)

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Under normal circumstances, the acceptance of anti-corrosion coatings is first carried out in accordance with ** or industry standards. Or, as a reference, the surface preparation at the grassroots level must meet the following standards: the internal anti-corrosion surface treatment must involve sandblasting, and the metal surface should reach the silver-gray SA2.5 grade ； When using manual or power tools for external anti-corrosion rust removal, it is necessary to remove the loose rust layer and paint film, ensuring that the surface is free of oil and dust. The paint film should be of uniform thickness and smooth; there should be no signs of missed painting, exposed substrate, undercutting, orange peel effect, peeling, severe sagging or running, whitening, or stickiness. The paint film thickness test passed, and the electrical spark pore detection test also passed. There shall be no delamination, obvious bubbling, warping, or similar defects between the anti-corrosion layer (such as rubber lining, SBS roof waterproofing layer, fiberglass lining, etc.) applied through thermal bonding and adhesive methods and the substrate.