Influence Of Post-treatments on Corrosion Behaviour of Gas Nitrocarburised Steels

P. Steyer Dr Steyer ([email protected]), Professor Millet and Professor Mazille are at the Laboratoire de Physico Chimie Industrielle, INSA de Lyon, 20 av. A. Einstein, F69621, Villeurbanne cedex. Dr Peyre is at Cetim, 52 avenue Felix Louat, BP 80067, F60304 Senlis cedex. Dr Jacquot is with Bodycote HIT, 25 rue des Freres Luminere, BP 143, F69686 Chassieu and Dr Hertz is with Framatome-ANP, 10 rue Juliette Recamier, F69456 Lyon cedex.

J.-P. Millet Dr Steyer ([email protected]), Professor Millet and Professor Mazille are at the Laboratoire de Physico Chimie Industrielle, INSA de Lyon, 20 av. A. Einstein, F69621, Villeurbanne cedex. Dr Peyre is at Cetim, 52 avenue Felix Louat, BP 80067, F60304 Senlis cedex. Dr Jacquot is with Bodycote HIT, 25 rue des Freres Luminere, BP 143, F69686 Chassieu and Dr Hertz is with Framatome-ANP, 10 rue Juliette Recamier, F69456 Lyon cedex.

H. Mazille Dr Steyer ([email protected]), Professor Millet and Professor Mazille are at the Laboratoire de Physico Chimie Industrielle, INSA de Lyon, 20 av. A. Einstein, F69621, Villeurbanne cedex. Dr Peyre is at Cetim, 52 avenue Felix Louat, BP 80067, F60304 Senlis cedex. Dr Jacquot is with Bodycote HIT, 25 rue des Freres Luminere, BP 143, F69686 Chassieu and Dr Hertz is with Framatome-ANP, 10 rue Juliette Recamier, F69456 Lyon cedex.

J.-P. Peyre Dr Steyer ([email protected]), Professor Millet and Professor Mazille are at the Laboratoire de Physico Chimie Industrielle, INSA de Lyon, 20 av. A. Einstein, F69621, Villeurbanne cedex. Dr Peyre is at Cetim, 52 avenue Felix Louat, BP 80067, F60304 Senlis cedex. Dr Jacquot is with Bodycote HIT, 25 rue des Freres Luminere, BP 143, F69686 Chassieu and Dr Hertz is with Framatome-ANP, 10 rue Juliette Recamier, F69456 Lyon cedex.

P. Jacquot Dr Steyer ([email protected]), Professor Millet and Professor Mazille are at the Laboratoire de Physico Chimie Industrielle, INSA de Lyon, 20 av. A. Einstein, F69621, Villeurbanne cedex. Dr Peyre is at Cetim, 52 avenue Felix Louat, BP 80067, F60304 Senlis cedex. Dr Jacquot is with Bodycote HIT, 25 rue des Freres Luminere, BP 143, F69686 Chassieu and Dr Hertz is with Framatome-ANP, 10 rue Juliette Recamier, F69456 Lyon cedex.

D. Hertz Dr Steyer ([email protected]), Professor Millet and Professor Mazille are at the Laboratoire de Physico Chimie Industrielle, INSA de Lyon, 20 av. A. Einstein, F69621, Villeurbanne cedex. Dr Peyre is at Cetim, 52 avenue Felix Louat, BP 80067, F60304 Senlis cedex. Dr Jacquot is with Bodycote HIT, 25 rue des Freres Luminere, BP 143, F69686 Chassieu and Dr Hertz is with Framatome-ANP, 10 rue Juliette Recamier, F69456 Lyon cedex.

Abstract

Nitrocarburising is a thermochemical diffusion treatment involving the surface nitrogen enrichment of low alloyed steels, leading to the formation of iron carbonitrides characterised by good tribological properties. In order to make engineering components multi-functional, new processes including post-operations have been developed in the last decade but their influence on corrosion resistance is not yet fully understood. The aim of the present study is to determine the corrosion behaviour of gas nitrocarburised steel produced on both a laboratory and industrial scale. Behaviour has been evaluated by salt spray tests as well as by electrochemical techniques (corrosion potential and polarisation resistance evolutions versus immersion time, potentiodynamic curves). All nitrocarburising treatment improves the corrosion resistance compared to untreated steel. Post-oxidising treatments have no significant influence on corrosion resistance but an impregnation step appears efficient in enhancing corrosion. The carbonitrides present in the 'white layer' are nobler than the substrate, and promote localised corrosion through open porosity of the outlayer by a galvanic effect.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Order Reprints Request Corporate Permissions

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

Request Academic Permissions

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.

Influence Of Post-treatments on Corrosion Behaviour of Gas Nitrocarburised Steels

Information for

Open access

Opportunities

Help and information

Influence Of Post-treatments on Corrosion Behaviour of Gas Nitrocarburised Steels

Abstract

Reprints and Corporate Permissions

Academic Permissions

Related research

To cite this article:

Download citation

Information for

Open access

Opportunities

Help and information

Keep up to date

Your download is now in progress and you may close this window

Login or register to access this feature