Trivalent Chromium Passivated Aluminum Honeycomb Core Salt Spray Resistant for Marine Use
Trivalent Chromium Passivated Aluminum Honeycomb Core Salt Spray Resistant for Marine Use
This Trivalent Chromium Passivated Aluminum Honeycomb Core is a lightweight, high-strength structural core material specifically engineered for marine and offshore applications where prolonged exposure to salt spray, high humidity, and corrosive atmospheres is unavoidable. The core is manufactured from high-grade aluminum alloy foil (3003H19 or 5052H18) bonded with a modified epoxy adhesive, and undergoes a specialized trivalent chromium conversion coating process that chemically forms a complex amorphous passive film on the aluminum surface. This is not a superficial coating — it is a molecular-level transformation that fundamentally enhances the material's corrosion resistance, adhesive bonding performance, and long-term durability in aggressive marine environments.
Why Trivalent Chromium Passivation?
Traditional hexavalent chromium treatments offer effective corrosion protection but carry significant environmental and regulatory burdens, including toxicity concerns and complex wastewater treatment requirements. Trivalent chromium passivation provides a RoHS-compliant, low-toxicity alternative that delivers comparable — and in some respects superior — corrosion protection without the regulatory headaches associated with hexavalent chromium. The trivalent process is also more heat-resistant than hexavalent passivation and serves as an excellent base for organic finishes and structural adhesives.
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Specification of Aluminum Honeycomb Core:
| Item | Unit | Specification | ||||||||
| Cell Size | inch | 1/8” | 3/16” | 1/4” | ||||||
| mm | 2.6 | 3.18 | 3.46 | 4.33 | 4.76 | 5.2 | 6.35 | 6.9 | 8.66 | |
| Side Length | mm | 1.5 | 1.83 | 2 | 2.5 | 2.75 | 3 | 3.7 | 4 | 5 |
| Foil Thickness | mm | 0.03-.05 | 0.03-.05 | 0.03- 0.05 | 0.03-.06 | 0.03-0.06 | 0.03-0.08 | 0.03-0.08 | 0.03-0.08 | 0.03-.08 |
| Width | mm | ≤440 | ≤440 | ≤440 | ≤1800 | ≤1800 | ≤1800 | ≤1800 | ≤1800 | ≤1800 |
| Length | mm | ≤1500 | ≤1500 | ≤2000 | ≤3000 | ≤3000 | ≤3200 | ≤4000 | ≤4000 | ≤5500 |
| Height | mm | 1.7~150 | 1.7~150 | 1.7~150 | 3~150 | 3~150 | 3~150 | 3~150 | 3~150 | 3~150 |
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| Item | Unit | Specification | ||||||||
| Cell Size | inch | 3/8” | 1/2” | 3/4” | 1” | |||||
| mm | 9.53 | 10.39 | 12.7 | 13.86 | 17.32 | 19.05 | 20.78 | 25.4 | ||
| Side Length | mm | 5.5 | 6 | 7.33 | 8 | 10 | 11 | 12 | 15 | |
| FoilThickness | mm | 0.03-.08 | 0.03-0.08 | 0.03-0.08 | 0.03-.08 | 0.03-0.08 | 0.03-0.08 | 0.03-0.08 | 0.03- 0.08 | |
| Width | mm | ≤1800 | ≤1800 | ≤1800 | ≤1800 | ≤1800 | ≤1800 | ≤1800 | ≤1800 | |
| Length | mm | ≤5700 | ≤6000 | ≤7500 | ≤8000 | ≤10000 | ≤11000 | ≤12000 | ≤15000 | |
| Height | mm | 3~150 | 3~150 | 3~150 | 3~150 | 3~150 | 3~150 | 3~150 | 3~150 | |
Specifications can be customized according to customer’s requirement.
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