Petrochemistry and Off-Shore Technology
Throughout the petrochemical industry, structural elements are expected to remain largely maintenance-free while withstanding demanding chemical and climatic conditions. Permanent refinement of flanges, screws, bolts, nuts, and springs in pneumatic valves is achieved with galvano-aluminum. In the case of traditionally zinc-plated components, brief hydrocarbon burns may cause embrittlement due to penetration of molten zinc into the steel matrix. This is successfully prevented by using aluminum.

In addition, various corrosion tests demonstrate that aluminum used in off-shore applications and under salt-spray conditions shows maximum permanence as compared to cadmium and zinc; which makes it a very suitable material for components that need to be designed for particularly high resistance.

Aluminized and yellow chromatized steel springs

Image 1. Aluminized and yellow chromatized steel springs