Using Inconel 625 to avoid pitting, crevice & corrosion

17 July 2020

Inconel 625 is a material with high resistance to pitting, crevices and corrosion cracking. The exotic alloy is highly resistant in a wide range of organic and mineral acids, and features a good high temperature strength. 

Characteristics include: great mechanical properties at both extremely low and extremely high temperatures; high resistance to pitting, crevice corrosion and intercrystalline corrosion; almost complete freedom from chloride induced stress corrosion cracking; high resistance to oxidation at elevated temperatures up to 1050c; good resistance to acids, such as nitric, phosphoric, sulfuric and hydrochloric, as well as to alkalis makes possible the construction of thin structural parts of high heat transfer. 

Applications vary greatly, including components where exposure to sea water and high mechanical stresses are required, oil and gas production where hydrogen sulfide and elementary sulfur exist at temperature in excess of 150C, and flare stacks on offshore oil platforms, among others. 

Image credit: High Performance Alloys, Inc.