Ships face constant exposure to saltwater, humidity, and fuel residues, leading to rust, scale, and tough stains that threaten performance and safety. Our high-purity oxalic acid (CAS No.: 6153-56-6) offers a cost-effective, non-corrosive solution for critical ship cleaning tasks-outperforming harsh industrial cleaners while protecting valuable marine equipment.
Scenario 1: Hull & Deck Rust Removal
Pain Point
A cargo ship's steel deck and hull edges developed rust patches (1-2mm thick) from saltwater corrosion. Sandblasting was costly and time-consuming, requiring the ship to be out of service for days.
Solution with Oxalic Acid
Preparation: Mix anhydrous oxalic acid (99.6% purity) with freshwater to make a 10% solution (10kg acid per 100L water); add a small amount of non-ionic surfactant for better adhesion.
Application: Apply the solution to rusted areas with a low-pressure sprayer, let it dwell 20-30 minutes (avoid direct sunlight to prevent drying).
Rinsing: Scrub lightly with a nylon brush, then rinse thoroughly with seawater followed by freshwater to neutralize.
Result
Rust dissolved completely without damaging the deck's protective coating.
Maintenance time cut by 60% compared to sandblasting, with no downtime for the ship.
Scenario 2: Engine Cooling System Scale Removal
Pain Point
A fishing vessel's engine cooling system had calcium carbonate scale buildup, reducing coolant flow and causing the engine to overheat during long voyages.
Solution with Oxalic Acid
Preparation: Create an 8% oxalic acid solution (8kg acid per 100L freshwater) and pre-filter to remove impurities.
Application: Disconnect the cooling system from the engine, circulate the solution with a pump for 3-4 hours at 40°C.
Neutralization: Drain the solution, flush with freshwater twice, then circulate a 2% sodium bicarbonate solution for 30 minutes to neutralize residual acid.
Result
Scale fully removed, restoring coolant flow to optimal levels.
Engine operating temperature stabilized, fuel efficiency improved by 8%.
Our oxalic acid is ideal for ship maintenance-non-toxic, compliant with IMO marine pollution regulations, and compatible with most ship materials.
📌 For quotations and product details, please contact:
Kitty Liu – Sales Manager
📱 Cel/Wechat: +86 138 2440 4576
📧 Email: kitty@weiqichem.com
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