Marine and Corrosive Environment Heat Exchangers

Ships, offshore platforms, and chemical plants expose heat exchangers to salt spray, high humidity, and aggressive gases. In these corrosive environments, material selection is as important as thermal design.

Material Options

• Hydrophilic aluminum: Good for clean marine ventilation, low cost.
• Stainless steel (304/316L): Resists salt and many chemicals; heavier and pricier.
• Epoxy / phenolic coated aluminum: Adds a barrier for acidic exhaust.
• Titanium: For extreme seawater or chloride exposure (premium).

Design for Harsh Duty

• Use drained, washable cores to remove salt and debris.
• Avoid crevices where chloride can pool.
• Specify marine-grade fasteners and frames.
• Plan for periodic fresh-water rinsing in offshore service.

Where They Are Used

• Engine room ventilation recovery
• Galley and accommodation HVAC
• Offshore module air handling
• Chemical plant exhaust and make-up air

Marine and offshore duty rewards conservative design. Favor drained, washable cores and crevice-free joints so chloride cannot pool and start corrosion. Specify marine-grade fasteners, frames, and coatings, and plan a fresh-water rinse cycle for vessels that operate in heavy salt spray. For engine-room ventilation the recovered heat can pre-warm intake air or service spaces, cutting heater load during cold transits. Where weight matters, compare aluminum against stainless on a life-cycle basis rather than first cost. Confirm coating standards and material certificates at procurement so the unit matches the vessel class rules. Our heat exchangers are available in stainless, titanium, and coated aluminum for corrosive service.

Frequently Asked Questions

Is aluminum safe at sea?
Bare aluminum corrodes in chloride environments. Coated aluminum or stainless is strongly advised for marine duty.

Which technology survives best?
Plate and heat-pipe cores with stainless or coated plates are the most durable; rotary wheels need careful desiccant and seal material selection.

Frequently Asked Questions

Is aluminum safe at sea?

Bare aluminum corrodes in chloride environments. Coated aluminum or stainless is strongly advised for marine duty.

Which technology survives best?

Plate and heat-pipe cores with stainless or coated plates are the most durable; rotary wheels need careful desiccant and seal material selection.