Search
Filters
Close

Corrosion Of Stainless Steels In Sulphuric Acid Environments: Influence Of Halide Content, Oxidizing Ions And Temperature

Product Number: 51321-16943-SG
Author: T. Kosec; P. Mocnik; T. Ohligschlager; T. Nyyssonen; H. Peltola; M. Lindgren; Y. El Ouazart; S. Hagg Mameng; L. Wegrelius; J. B. Jorcin; E. Huttunen-Saarivirta
Publication Date: 2021
$0.00
$20.00
$20.00

Stainless steel is a common material in reactors, tanks, pipes, mixers, filters and valves in process industry. The selection of a suitable stainless steel grade for a specific industrial application is conducted based on the characteristics of the environment, but often limited by the foreseen lifecycle costs. For applications in raw material sector, the main challenge is that corrosion performance data for several stainless steel grades for, e.g., hydrometallurgical processes is lacking. Corrosion rate of the materials may remain low when general corrosion is the primary corrosion form, but material losses across wall thickness may become high if localized
corrosion is present. Therefore, in order to make material choices that enable a continuous and safe operation of the process, it is important to define such operation conditions that cause the corrosion mechanism change.
In this research, altogether six austenitic and duplex stainless steel grades with a varying Pitting
Resistance Equivalent Number (PREN) were studied in test environments which varied with respect to
their H₂SO₄ and chloride concentrations, while temperature ranged from room temperature up to 90°C. The results from potentiodynamic polarization measurements are presented and discussed. The electrochemical measurements are complemented with immersion tests conducted in environments with chlorides.

Stainless steel is a common material in reactors, tanks, pipes, mixers, filters and valves in process industry. The selection of a suitable stainless steel grade for a specific industrial application is conducted based on the characteristics of the environment, but often limited by the foreseen lifecycle costs. For applications in raw material sector, the main challenge is that corrosion performance data for several stainless steel grades for, e.g., hydrometallurgical processes is lacking. Corrosion rate of the materials may remain low when general corrosion is the primary corrosion form, but material losses across wall thickness may become high if localized
corrosion is present. Therefore, in order to make material choices that enable a continuous and safe operation of the process, it is important to define such operation conditions that cause the corrosion mechanism change.
In this research, altogether six austenitic and duplex stainless steel grades with a varying Pitting
Resistance Equivalent Number (PREN) were studied in test environments which varied with respect to
their H₂SO₄ and chloride concentrations, while temperature ranged from room temperature up to 90°C. The results from potentiodynamic polarization measurements are presented and discussed. The electrochemical measurements are complemented with immersion tests conducted in environments with chlorides.

Also Purchased
Picture for 01342 Metallic Materials for Concentrated Sulfuric
Available for download

01342 Metallic Materials for Concentrated Sulfuric Acid Service

Product Number: 51300-01342-SG
ISBN: 01342 2001 CP
Author: Michael H. W. Renner
$20.00
Picture for Sulfuric Acid Corrosion of Several Ni-Base Alloy Weld Overlays
Available for download

51315-5749-Sulfuric Acid Corrosion of Several Ni-Base Alloy Weld Overlays

Product Number: 51315-5749-SG
ISBN: 5749 2015 CP
Author: Bingtao Li
Publication Date: 2015
$20.00