Process Piping Materials – Module 2 – M06-036

−Titanium resists all forms of corrosive attack in fresh and sea water to temperatures of 500°F (260°C).

−Titanium is resistant to highly oxidizing acids over a wide range of temperatures and concentrations. Here are some of the common applications in corrosion-resistant service:

Chlorine Chemicals

Hydrochloric Acid

Phosphoric Acid

Sea Water

Sulfuric Acid

Nitric Acid

−Caution: Although Titanium has an excellent corrosion resistance to nitric acid over a wide range of temperatures and concentrations, it should not be used in applications with red fuming nitric acid, as a dangerous pyrophoric reaction product can be produced.

•Standards

−ASTM B-363

2.12.Zirconium

Zirconium Piping is very often specified for highly-corrosive industrial applications and frequently used in processes in which chlorides are a component. These and other very corrosive chemicals are damaging to lesser materials. This corrosion can rapidly lead to repair and/or replacement of the equipment in a short time frame, causing expensive and highly disruptive process stoppage.

•Characteristics

Zirconium is compatible with high temperatures up to 1200ºF, in reducing or oxidizing applications. In addition to high resistance to uniform corrosion attack, Zirconium can be extremely protective against pitting, stress and crevice corrosion.

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