Rust Grades

Rust Grades

BS 7079 Pt A, ISO 8501, SS 05 59 00

Preparation of steel substrate before application of paints and related products.

1. Rust Grade A -

Steel surface largely covered with adherent millscale with little if any rust.

2. Rust Grade B -

Steel surface, which has begun to rust and from which the millscale has begun to flake.

3. Rust Grade C -

Steel surface on which the millscale has rusted away or from which it can be scraped, but with slight pitting visible under normal vision.

4. Rust Grade D -

Steel surface on which the millscale has rusted away and on which general pitting is visible under normal vision.

---