Marine Salt Resistant Double Coated Aluminum Sheet

Core Advantages

1. Double-sided full PVDF heavy anti-corrosion coating

   Front and back sides are uniformly coated with ≥25μm fluorocarbon topcoat, no thin protective paint on the back, double isolation from salt fog, moisture and sea wind chloride ions.

2. Special marine anti-salt passivation pretreatment

   Added thickened chromium-free anti-salt passivation film, greatly improve the adhesion between paint and aluminum substrate, inhibit chloride ion penetration, salt spray test reaches over 3000 hours.

3. High-strength seawater resistant alloy substrate

   Adopt 3004 / 5052 aluminum alloy with superior anti-rust performance, not easy to corrode and perforate under long-term sea fog immersion, higher structural stability than conventional 1060/3003.

4. Long-term outdoor weather resistance

   PVDF coating has strong UV resistance, will not fade, chalk or peel under strong coastal sunlight, service life up to 20 years in seaside environment.

5. Excellent processing forming performance

   The paint film maintains good flexibility, no cracking, peeling or edge burst during bending, cutting, stamping and welding processing, suitable for complex curved curtain wall forming.

6. Uniform matte low-gloss decorative surface

   Rich customizable RAL solid colors, metallic silver, stone grain and wood grain textures, low-gloss finish to avoid coastal strong light reflection glare.

7. Double-sided independent anti-scratch protective film

   Both decorative surfaces are covered with transparent PE protective film, prevent scratch and pollution during sea transportation, cutting and installation.

8. Complete customized flat sheet specifications

   Support customized fixed length flat sheets according to customer drawing requirements, thickness 0.3–2.5mm, width 600–2650mm, arbitrary length cutting.

Production Process

Aluminum alloy flat blank feeding → Double-sided multi-cycle degreasing cleaning → Marine special anti-salt passivation treatment → Constant temperature hot air drying → Double-sided epoxy anti-rust primer coating & curing → Double-sided thick PVDF fluorocarbon top coat coating & high temperature baking → Natural cooling to room temperature → Double-sided anti-scratch protective film lamination → Fixed length cross cutting → Full sheet surface inspection → Salt spray sampling test → Moisture-proof export packaging

Standard Technical Parameters

Main Application Fields

1. Coastal commercial building exterior: Seaside hotel curtain wall, coastal shopping mall outer wall panel, seaside villa facade & roof plate

2. Port & offshore engineering: Wharf equipment decorative cladding, port administration building wall panels, offshore platform outer decorative sheets

3. Island construction projects: Island resort decorative wall, island resident house roof and wall panels, island scenic spot exterior decoration

4. Coastal industrial factory: Seawater desalination plant wall cladding, coastal chemical workshop anti-corrosion interior panels, fishery processing plant outer wall

5. Coastal public infrastructure: Seaside station decorative panels, coastal hospital exterior wall, coastal park landscape decorative plates

Export Packaging Standard

Each marine salt resistant double coated aluminum flat sheet is separated by soft anti-scratch paper between layers, double-sided protective film intact. The whole stack is wrapped with multi-layer moisture-proof PE film and thick neutral kraft paper to resist sea salt fog and moisture during long ocean transportation. The sheet stack is fixed on fumigated wooden pallet with high-strength steel strapping to avoid collision and scratch. Clear shipping marks are printed outside, including alloy grade, thickness, width, length, marine anti-salt coating type, color code, net weight, gross weight and batch number. We can provide complete fumigation certificate, Mill Test Certificate, long-time salt spray test report and full set customs clearance documents for overseas coastal engineering bidding and import inspection.

Inspection & After-sales Service

We implement eight strict pre-shipment inspection procedures: coating thickness detection, double-sided coating uniformity inspection, cross-cut adhesion test, 3000h salt spray sampling test, UV aging test, color difference comparison, flatness inspection and full surface defect screening. Complete supporting documents including Mill Test Certificate, marine anti-corrosion performance test report, RoHS environmental certificate, commercial invoice and packing list can be supplied for customer factory audit and project bidding. Our professional technical team provides free cutting, bending and welding processing guidance for coastal engineering panels at any time. If coating peeling, uneven salt resistance or surface quality defects are confirmed within 7 working days after receiving goods, we will reply within 24 hours and provide targeted solutions including re-production, supplementary shipment or reasonable compensation.

FAQ

Q1: What is the difference between this marine grade sheet and ordinary PVDF aluminum sheet?

A: Ordinary PVDF sheet only has thin protective paint on the back, low salt spray resistance; this product adopts double-sided complete thick PVDF coating + special anti-salt passivation, salt spray resistance over 3000 hours, specially for high chloride coastal and island environments.

Q2: Can it be used for island villa roof decoration?

A: Yes, double-sided anti-corrosion coating can resist long-term erosion of sea fog, rain and strong ultraviolet rays, and it is widely used for island roof and exterior wall cladding.

Q3: Can you provide salt spray test report for overseas marine project bidding?

A: We can provide official long-hour neutral salt spray test report, MTC material certificate, UV aging report and all export customs clearance documents required by offshore engineering buyers.

Q4: Will the coating peel off after seaside bending and welding processing?

A: Optimized flexible fluorocarbon paint formula matches marine passivation layer, conventional bending and welding forming will not cause paint cracking or peeling.

Q5: Can I customize wood grain or stone grain marine anti-corrosion flat sheets?

A: We support thermal transfer wood grain, marble grain on double-sided PVDF marine aluminum sheets, all textures retain the same heavy salt corrosion resistance performance.