Corrosion properties

Stainless steel is well-known for its corrosion resistance. More information on the corrosion properties of stainless steels can be found here.

Abrasive corrosive wear of stainless steels

Laboratory abrasive and abrasive-corrosive testing has been carried out on a range of ferritic, austenitic and martensitic stainless steels and  the results compared with the testing of similar materials in situ in the abrasive­ corrosive conditions of a gold mine. All grades were found to have better abrasive-corrosive resistance than proprietary abrasion-resistant alloys.

The austenitic  grades derive their outstanding properties from their capacity to resist unstable fracture of microshear lips on the abraded sur­ face. This is due to the strain capacity afforded by the mechanical induce­ ment of the martensitic phase transformations and the high work-hardening characteristics of the transformation product. The influence of this transfor­ mation has been studied as a function of prior cold work and velocity of abrasion on a range of austenitic grades of stainless steels.

Notwithstanding these advantages of the austenitic grades, the ferritic grades are superior in terms of cost per unit volume lost and the new duplex ferritic-martensitic steel designated 3CR12 has potential as an abrasion­ resisting material in corrosive environments.

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Published: 6/6/2017
Last modified: 6/6/2017

Stainless Steel in Contact with Other Metallic Materials

Complex design requirements can make it necessary to combine different metallic materials within the same component. Also, chance combinations can often be found, governed only by the availability of, for instance, fasteners or shims. In certain circumstances, such mixed-material designs can lead to corrosion in one of the partner materials. This phenomenon includes galvanic corrosion, in which two different metals form a galvanic couple. 
The present publication describes the principles of galvanic corrosion and the main parameters that allow designers to estimate corrosion risk.

This brochure is available in English, Czech, Dutch, Finnish, French, Italian, Polish, Spanish, Swedish and Turkish

Published: 17/12/2015
Last modified: 17/12/2015

Stainless Steel for Coastal and Salt Corrosion Applications

This handbook is designed to acquaint the reader with the 300 series stainless steels, particularly grades 304 and 316 and their applications in areas where coastal or salt corrosion is a factor in the life of a metal component.

Source: Specialty Steel Industry of North America

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Published: 11/5/2012
Last modified: 11/5/2012

Corrosion of Metals in Composite Cements

The paper describes an investigation which seeks to understand the corrosion mechanisms of Aluminium, Magnesium Mild Steel and Stainless Steel in different cement systems.

Source: University of Sheffield

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Published: 4/5/2012
Last modified: 4/5/2012

Corrosion Resistance of Stainless Steels in Soils and in Concrete

Corrosion by soil is a complex phenomenon due to the great number of variables involved. In principle, stainless steels should be in the passive state in soils, but the presence of water and aggressive chemical species such as chloride ions, sulphates and as well as types of bacteria and stray current, can cause localised corrosion.

Source: Euro Inox

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Published: 4/5/2012
Last modified: 4/5/2012

Galvanic Corrosion

When two different metals are immersed in a corrosive solution, each will develop a corrosion potential. If the corrosion potential of the two metals is significantly different, and they are in direct contact and immersed in an electrolyte, the more noble metal will become the cathode and the more active metal will become the anode. A measurable current may flow between the anode and the cathode. The corrosion rate of the anode will be increased and the cathode decreased. The increased corrosion of the anode is called "galvanic corrosion".

Source: Specialty Steel Industry of North America

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Published: 4/5/2012
Last modified: 4/5/2012

Seawater Resistance of Stainless Steels

Stainless steels are susceptible to crevice or pitting attack in chloride bearing waters. Their behavior has been studied by a number of investigators. There is considerable variation in the percentage of apparently identical sites where attack occurs, when it occurs.

Source: The Hendrix Group, Materials and Corrosion Engineers

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Published: 4/5/2012
Last modified: 4/5/2012

Stainless Steel for Coastal and Salt Corrosion Applications

This handbook is designed to acquaint the reader with the 300 series stainless steels, particularly grades 304 and 316 and their applications in areas where coastal or salt corrosion is a factor in the life of a metal component.

Source: Specialty Steel Industry of North America

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Published: 4/5/2012
Last modified: 4/5/2012

The Self-repair Mechanism of Stainless Steel

Stainless steel is self-healing. This is why it does not require any coating or other corrosion protection.

Source: Euro Inox

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Published: 4/5/2012
Last modified: 4/5/2012

Corrosion Basics – an Introduction

A general textbook on all types of corrosion. Contains a chapter on metals and alloys including stainless steels (to order as a hard copy).

Source: Corrosion Doctors

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Published: 4/5/2012
Last modified: 4/5/2012

Preventing Coastal Corrosion

When used properly, stainless steel enjoys a strong and enduring reputation for visual appeal and structural integrity in a wide range of applications and environments.

But, like all materials, stainless steel may become stained or discoloured over time, impairing the overall look. This brown discolouration - tea staining - has been identified in coastal applications in Australia and overseas.

Source: Australian Stainless Steel Development Association

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Published: 4/5/2012
Last modified: 4/5/2012

Introduction to Corrosion Resistance of Stainless Steels

The corrosion resistance of stainless steel arises from a “passive”, chromium-rich, oxide film that forms naturally on the surface of the steel. The mechanisms of corrosion include crevice corrosion, pitting corrosion, intercystalline (or intergranular) corrosion (ICC), stress corrosion cracking (SCC) and galvanic (bi-metallic) corrosion and are often associated with chlorides or acid conditions.

Source: British Stainless Steel Association

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Published: 4/5/2012
Last modified: 4/5/2012

Corrosion Barriers for Thermally-Insulated Stainless Steels

Pitting and stress corrosion can result from moist thermal insulation where chlorides are present. This information sheet provides background information on the sources of chlorides within such insulation materials and describes two corrosion prevention methods.

Source: British Stainless Steel Association

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Published: 4/5/2012
Last modified: 4/5/2012