Wire Cloth Aluminizing

Aluminizing Corrosion Protection & Alonizing

Aluminizing, also known as alonizing is a high temperature chemical process whereby aluminum vapors diffuse into the surface of the base metal forming new metallurgical aluminide alloys. At Marco Specialty Steel we offer wire cloth aluminizing or aluminizing corrosion protection.

High temperature corrosion of metals due to oxidation, sulfidation and carburization is a major concern in industry, especially with petrochemical processing equipment. Aluminizing or aluminum diffusion alloying is an economical process for inhibiting such corrosion by protecting the surface of steels, stainless steels and nickel alloys operating in severe high temperature environments.

The aluminide alloys formed at the surface contain 20% minimum aluminum. Typical case depths:

  • Carbon and alloy steel = 5-20 mils
  • Stainless and nickel base alloys = 2-10 mills

Corrosion Protection Properties of Aluminizing

  • Sulfidation Resistance - steel protection from H2S, SO2 SO3 attack
  • Oxidation Resistance - stable aluminum oxide film formed
  • Carburization Resistance - prevents carbon diffusion into base metal
  • Hydrogen Permeation - diffusion rates of H2 into steel reduced
  • Welding of aluminized surfaces can be done using special procedures

Corrosion Protection Applications for Aluminizing

  • Refinery Hydrocrackers and Hydrodesulphurizer Units - Stainless catalyst reactor screen, wire cloth and baskets to reduce scaling from sulfidation.
  • Sulfur and Sulfuric Acid Plants - Catalyst trays, nickel alloy burner assemblies for resistance to hot H2S, SO2 and SO3 corrosion.
  • Gas Plants Using Claus Technology - Reactor and support grating and tubing for H2S, SO2 and O2 resistance.

Corrosion Rate Chart

Approved supplier to:

  • Chevron
  • Exxon
  • BP
  • Arco
  • And many more!

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