Zinc Dust Slurry Tank Selection (Zinc-Rich Primer Bulk Storage)

Storing Zinc Dust Slurry? Start Here

If you're dealing with zinc dust slurry, you're likely in the coatings industry, using it for zinc-rich primers or protective coatings. This slurry combines zinc dust and zinc oxide in a water or solvent carrier. It's crucial for corrosion protection in various industries, from maritime to heavy equipment. However, storing it properly is essential to maintain its quality and safety.

Can you store it in a poly tank?

Yes, you can store water-borne zinc dust slurry in polyethylene tanks, particularly HDPE or XLPE, which are standard for this purpose. However, these tanks are not suitable for solvent-borne zinc slurry. For solvent-borne types, stainless steel or HDPE-lined tanks are necessary.

Key Issue: Sedimentation and Agitation

Zinc dust slurry tends to settle quickly due to the heavy zinc particles. If left static for more than 30-60 minutes, the zinc will settle permanently. To prevent this, continuous mechanical agitation or a low-shear recirculating pump is mandatory to keep the slurry mixed.

The safety that actually matters

• Ensure continuous agitation to prevent zinc settling.
• Monitor pH levels to avoid hydrogen gas generation.
• Use abrasion-resistant materials to handle the slurry.
• Implement freeze protection for water-borne slurries.
• Preserve with biocides to prevent microbial growth.

Common questions

Can zinc dust slurry freeze?

Yes, water-borne zinc dust slurry can freeze and requires insulation and heat tracing in cold climates.

What materials are best for storing zinc dust slurry?

HDPE or XLPE tanks are suitable for water-borne slurry, while stainless steel is needed for solvent-borne types.

How do I prevent hydrogen gas buildup?

Regularly monitor pH levels and ensure proper venting and flame arrestors are in place.