Short answer: Marine and offshore structures pick metal against the salt environment: 5083 aluminium for light hulls and topsides, 316L and 2205 duplex stainless for immersed and splash-zone duty, and titanium where immunity is worth the cost, with the choice backed by corrosion data rather than habit.
At a Glance
Start With the Zone
Corrosion rate depends on whether the part sits in the splash zone, fully immersed or in warm topside air, so the service defines the metal; the baseline is in our Marine Grade Aluminium 그리고 Seawater Corrosion Guide.
Aluminium for Light Structures
5083 and 5052 build light, corrosion-resistant hulls and superstructures; the alloy numbers are in our 5083 Properties and the welded structure angle in our Fatigue Guide.
Stainless for Immersed Duty
Where stainless is used below the waterline, 316L is the floor and 2205 duplex wins in the splash zone for pitting resistance; compare in our 316 vs 316L 그리고 Duplex 2205 Guide, and against coatings in our Galvanized vs Stainless.
Under-Insulation and CUI
Pipes and vessels under lagging face corrosion under insulation, so grade and coating must be specified together; our CUI Guide covers the failure mode and our Titanium Grades Guide the premium option.
Specifying for Reliability
Buyers should specify the zone and acceptance standard, then let the supplier propose the leanest qualified alloy; our How to Choose a Metal Supplier 그리고 304 vs 316 help frame the RFQ.
Get a Quote
Tell HXSCO your requirements and we will respond with a competitive quote and lead time.
자주 묻는 질문
5083 for welded hulls and 5052 for formed topside parts.
Yes for many immersed parts, but 2205 duplex is better in the splash zone.
Titanium Grade 2 for immunity, 2205 duplex where cost matters.
Localised attack under lagging; avoid with grade and coating choice.
We supply aluminium, stainless and titanium with mill certificate; send the zone.
Source Marine-Grade Metal from HXSCO
HXSCO supplies aluminium, stainless and titanium for marine and offshore duty with mill certificate. Describe your zone and we will propose the alloy.