Edmeston SX® sulfuric acid steel

Stainless steel alloy resistant to sulfuric acid

Edmeston SX® acid-resistant stainless steel, UNS S 32615, has excellent corrosion resistance over a wide concentration range at high temperatures. It has significant advantages over other alloys and traditional materials like cast iron, including superior equipment lifetime, low maintenance requirements, and ease of fabrication.

Edmeston SX® alloy

Benefits

• Excellent corrosion resistance over a wide concentration range
• Superior equipment lifespan and minimal maintenance
• Clean acid-free from corrosion products
• Lightweight speeds up installation and reduces the need for foundation work

Applications

Edmeston SX^® sulfuric acid steel is particularly suitable for use in the following applications:

• Sulfuric acid absorption towers and pump tanks
• Sulfuric acid coolers
• Sulfuric acid pipes and fittings
• Sulfuric acid pipe and trough distributors
• Sulfuric acid strainers, mesh pads, inserts, thimbles etc.
• Sulfuric acid welding materials

• Nitric acid tanks, pipes and condensers

Edmeston SX® sulfuric acid steel's corrosion properties

When exposed to sulfuric acid, Edmeston SX® sulfuric acid steel forms a very strong passive surface layer of silicon oxide that protects it against corrosion.

Under the normal plant operating conditions, the material has excellent corrosion resistance in both static and dynamic conditions (see iso-corrosion diagram, Figure 1).

Through its 30-year history, Edmeston SX® sulfuric acid steel has also proven capable of handling periods of upset conditions.