Copper Slag

10-20 mesh copper slag sits in the versatile medium coarse range, engineered specifically for routine rust and mill scale elimination on carbon steel, differentiated from the ultra-coarse 5-10 mesh variant built for stripping thick built-up linings and heavy bitumen coatings. This ferrosilicate blast media is refined through multi-stage washing, de-salting and closed-circuit screening to deliver a balanced particle curve, prioritizing consistent rust removal performance while avoiding the overly deep, jagged anchor profile left by 5-10 mesh copper slag.

Formulated for standard anti-corrosion coating workflows, this grade reliably strips adherent rust, rolling mill scale and tightly bonded oxide layers, consistently achieving ISO 8501-1 Sa 2.5 near-white and Sa 3 cleanliness grades. It creates a uniform, moderate anchor profile optimized for conventional epoxy, polyurethane and alkyd anti-corrosion paints, eliminating the risk of excessive profile peaks that waste coating material and increase project paint consumption. The controlled particle gradation also reduces embedment risk on steel substrates, a key concern for long-term coating integrity on structural steel jobs.

Compliant with ISO 11126-3, this copper slag has low soluble silica and strictly controlled soluble chloride levels. It delivers steady cutting speed for extended blast runs, and its dust characteristics strike a practical balance for both yard blasting and semi-enclosed blast sheds, where visibility control matters to your blasting crew. It remains a cost-effective expendable abrasive, the go-to selection for mid-sized steel fabrication, maintenance and new construction projects that focus primarily on rust clearance rather than heavy coating demolition.

Key Features:
Medium-coarse balanced grading, optimized for rust & mill scale removal (not heavy lining stripping)
Controlled moderate anchor profile, perfectly matched for standard anti-corrosion paint systems
Low soluble chloride after washing, minimises embedded salt contamination on carbon steel
Stable particle distribution, less grit embedment risk vs extra coarse 5-10 mesh copper slag
ISO 11126-3 certified, low free silica for safer open-yard blasting operations
Predictable blast output, ideal for fixed-budget structural steel rust removal contracts

Specifications:
Grade: 10-20 Mesh
Mohs Hardness: 6.5-7.0
Specific Gravity: 3.5-3.8 g/cm³
Grain Shape: Angular crushed ferrosilicate slag
Compliance: ISO 11126-3
Soluble Chloride: ≤20 ppm
Surface Cleanliness: Achieves Sa2.5 / Sa3

Main Applications: New structural steel fabrication blast cleaning, carbon steel framework rust removal, bridge maintenance blasting, water tank exterior rust treatment, heavy machinery oxide cleaning, pipeline surface preparation for standard anti-corrosion coatings, workshop yard blasting for steel component pre-treatment.

We supply 10-20 mesh copper slag in 25kg woven sacks and 1000kg jumbo bulk bags. Batch inspection certificates, chloride test reports and MSDS can be provided. Trial samples are available for blast profile validation before bulk shipment.