• 05.05.2026

Sandblasting Process Stages and Applications

Proper preparation of metal surfaces for industrial painting — step by step.

Sandblasting is an essential stage in preparing metal structures for painting. Without proper surface preparation, even the most expensive coating will not last.

**Key stages:** 1. **Initial assessment** — evaluation of rust, oil, and existing paint 2. **Abrasive selection** — based on substrate (chilled iron grit, garnet, aluminum oxide) 3. **Blasting** — to SA 2.5 or SA 3 cleanliness 4. **Surface profile verification** — using replica tape 5. **Dust removal and immediate coating** — within 4 hours to prevent flash rust

Properly executed sandblasting can extend coating life by a factor of 2–3.