GBA — Grit Blast & Aluminize

Blocks corrode from the inside out.

Grit blasting strips the corrosion out of a water-cooled block's cooling passages and takes the cavity back to clean base metal. Aluminizing then lays a sprayed aluminium barrier between the water and the casting.

Interior of a water-cooled wire drawing block before treatment, the cooling passages heavily rusted and scaled
Before
The same block interior after grit blasting and aluminizing, back to clean coated metal
After
GBA — Grit Blast & Aluminize

Water-cooled blocks corrode from the inside out.

A water-cooled block can look serviceable on the working face while its cooling passages fill with rust and scale. That corrosion insulates the casting from its own coolant, so the block runs hotter than it should, and it keeps advancing whether or not the outside is rebuilt.

GBA treats the side of the part the wear coatings never touch. Grit blasting strips the corrosion out of the interior and takes the cavity back to clean base metal. Aluminizing then lays a sprayed aluminium layer over that cleaned surface, putting a barrier between the water and the casting so corrosion does not simply return.

  • Grit blast the interior back to clean base metal
  • Aluminize the cleaned surface as a corrosion barrier
  • Restores heat transfer lost to rust and scale
  • Pairs with hardsurfacing on the working face
Where it fits

Best-fit applications and adjacent processes.

Water-cooled wire drawing blocks

The core application. Any block with internal cooling passages is a candidate once scale starts to build.

Interiors the wear coatings never reach

Cavities and passages that a rebuild of the working face leaves untouched, where corrosion keeps advancing.

Blocks already scheduled for hardsurfacing

GBA pairs with a working-face rebuild, so the inside and the outside of the part are addressed in one visit.

Get started

Send us your part.

Drawings, dimensions, or just a description. Our engineering team will recommend the alloy and process that fit the wear pattern.

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