ALUMINIZING • PROPERTIES • APPLICATIONS • CORROSION RATE CHART

ALUMINIZING PROCESS

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.

Aluminizing is a high temperature chemical process whereby aluminum vapors diffuse into the surface of the base metal forming new metalurgical aluminide alloys. 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