Precautions for Workpiece Treatment in Dalian Shot Blasting

Shot blasting removes rust, scale and cleans/strengthens surfaces, widely used in Dalian shipbuilding, machinery and auto parts industries. Given local humid marine climate with salt spray, key notes are as follows:

1. Pre-treatment

Remove surface dirt to avoid re-contamination. Clean oil stains thoroughly, strip heavy rust preliminarily, and fully dry workpieces to prevent pellet caking and poor cleaning effect.

2. Process Parameter Matching

Select proper shot materials by workpiece types: steel shots for heavy parts, fine glass/stainless steel shots for precision parts. Adjust blasting speed, angle and duration accordingly. Keep shots dry; use low-temperature resistant shots in cold winter.

3. In-process Supervision

Inspect surface roughness and blasting quality regularly. Maintain worn machine parts and clean dust removal devices daily. Follow strict safety operation rules.

4. Post-treatment

Blow away residual shots and dust. Apply coating or anti-rust treatment within 24 hours against quick rusting in humid air. Store finished products in dry and moisture-proof environment.

5. Special Workpiece Handling

Reduce blasting intensity for thin-walled parts. Protect threads and precision holes with fixtures. Use matched equipment for large workpieces for uniform treatment.

6. Environmental Protection & Cost Control

Equip qualified dust removal facilities. Recycle and reuse shots. Treat cleaning wastewater properly to meet local emission standards.

In summary, full-process standard operation adapting to local climate and industrial features guarantees product quality, safety and environmental compliance.