Marine & Offshore Engineering Castings

Overview

The marine environment — high salt, high humidity, long-term immersion — imposes the most severe corrosion requirements. Hiyet exclusively uses seawater-resistant Al-Mg alloys (5083, 6061) or dedicated marine cast alloys (A356-T6); copper-rich ADC12 is strictly excluded because copper accelerates intergranular corrosion.

Process selection favours low-pressure or sand casting, followed by aging to stabilise the microstructure. Surfaces are protected with heavy-duty anti-corrosion coatings or micro-arc oxidation, passing 720-hour salt-spray. Classification-society certification (CCS, ABS, DNV, LR) can be coordinated on request.

Typical applications

Frequently Asked Questions