Indian Drum Reconditioner Optimizes Differential Coating for Acid Drums

 Indian Drum Reconditioner Optimizes Differential Coating for Acid Drums

Company Profile: A Gujarat-based drum reconditioning and recycling company that collects used chemical drums, cleans them, and resells them for secondary use.

Challenge: Drums that originally contained hydrochloric acid (HCl) showed severe pitting corrosion on the interior surface after just one use. The reconditioning process (washing, sanding, relining) was too expensive to justify for drums with deep pitting. The customer needed new drums with extended first-life duration to improve their reconditioning economics.

Solution Provided: We supplied 0.22mm Double Reduced DR8 Electrolytic Tinplate Coil with a heavy differential coating: 11.2/5.6 g/m². The interior coating (11.2 g/m²) is the heaviest standard tin coating available, providing exceptional resistance to acid attack. Exterior coating (5.6 g/m²) remains sufficient for printing and general corrosion protection. Width: 1,000mm. Surface finish: Stone Finish (R) to hide handling scratches.

Implementation: 80 metric ton trial order. The customer filled 1,000 test drums with 32% HCl solution and stored them for 90 days. They then drained, washed, and inspected the drums.

Results:

• Interior pitting depth averaged 0.05mm vs. 0.18mm on standard 5.6/5.6 coated drums

• 92% of test drums qualified for reconditioning after a single wash cycle (up from 65%)

• Reconditioning cost per drum reduced from $4.20to$1.85

• The customer can now sell reconditioned drums at a premium price

Customer Quote: "The heavier tin coating pays for itself in the second life of the drum. We've calculated a 34% ROI just from reduced reconditioning labor."

Follow-up: The customer has standardized on 11.2/5.6 differential coating for all acid-grade drums and increased their monthly order volume by 200 metric tons.