Galvalume Pot & Sink Rolls
Manufacture and reconditioning of the rolls that run submerged in molten aluminium-zinc coating baths.
Industrial Sectors — 07 / Continuous process lines & coating plant
Metals & Petrochemicals
A continuous galvanizing or Galvalume line is one of the most hostile environments in metals processing. Pot and sink rolls are immersed in a molten 55% aluminium-zinc bath, where conventional stainless and chromium heat-resistant steels are progressively corroded and worn away by the melt itself — which is why journal sleeves and bushings are routinely clad by spray-fuse or transferred plasma arc rather than simply replaced. The line cannot stop, so roll change intervals govern plant economics.
What this sector demands
- Roll and journal materials that survive immersion in molten aluminium-zinc
- Overlay cladding of journal sleeves and bushings by weld, spray-fuse or plasma-transferred arc
- Concentric, dynamically true rolls — a coating line prints every defect onto the strip
- Predictable reconditioning cycles that match planned line stoppages
- High-temperature-capable alloys and heat treatment for petrochemical rotating equipment
How Rainbow supports it
Rainbow manufactures and reconditions steel rolls for the Galvalume industry, combining a foundry that casts ferrous and non-ferrous alloys — by sand moulding and centrifugally — with heat treatment, hardfacing, thermal spray and precision grinding. The same chain serves petrochemical rotating equipment, where high-temperature alloys, coatings and balanced rotors matter more than raw material cost.
Behind it
- ISO 9001:2015
- In-house foundry & heat treatment
Our specialities
What we do for Metals & Petrochemicals
Journal Sleeves & Bushings
Overlay cladding and machining of the sacrificial journal components that decide roll service life.
Petrochemical Rotating Equipment
Pumps, compressors and drives overhauled, coated and balanced for continuous high-temperature duty.
Special Alloy Castings
Sand and centrifugal casting of heat- and corrosion-resistant alloys, heat treated and finish machined in-house.
Components
Applications serving this sector
Start a project
Working in Metals & Petrochemicals?
Send us the component, the duty and the deadline. Our engineers will come back with the repair or manufacturing route — and the licence it sits under.