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Effect of Acid Concentration and Temperature on Active Corrosion Rate of Stainless Steel and Nickel Base Materials

Material selection of passivating materials is often based on the assumption of a limit for passivity. In essence this means that for a given environment the selected material should have a corrosion rate that is low enough to be considered negligible. The limit between active corrosion and passivity may be more or less fluid depending on both material and environment. Furthermore active corrosion at a predictable and reasonably low rate may in some cases be acceptable. This work has studied the effect of acid concentration and temperature on the corrosion rate of three different materials. The conditions have been chosen to be able to study both passive conditions and the increase in active corrosion rate as conditions become gradually more aggressive. The studied materials UNS S32205 N08904 and N08825 have been selected due to their relatively similar compositions except the increasing nickel content in each material.

Product Number: 51319-13330-SG
Author: Björn Helmersson
Publication Date: 2019
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