-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics

topic 3950

Plating / Coating after Nitriding / Carburising


What effect do nitriding / carburising have on the adhesion of plated / coated layers (hard chrome / TiN / TiCN) etc. Does the hardening method (or indeed the hardness of the nitrided / carburised layer) cause any loss of adhesion? I would really appreciate any help on this subject.

Wayne Ward
- England


I remember seeing some papers on TiN deposition after nitriding given at the International Conference on Metallurgical Coatings and Thin Films (ICMC-TF). The conference proceedings are usually published in Surface and Coatings Technology. Check your local university engineering library -- they probably carry the journal.

jim treglio portrait
Jim Treglio
PVD Consultant - San Diego, California


Ion nitriding and carburizing are both acceptable pre hard chrome plating base metal treatments. However, suitable pre-plate surface requirements must be achieved to ensure proper adhesion of the hard chrome coating. The adhesion of the hard chrome coating is not effected by the hardness of the base material. However, a base material that is not hardened properly can cause the hard chrome coating to fail.


Stephen C. Ward
- Canada


As stated previously, the hardness of the Nitrided or Carburised surface is not a real concern with regard to adhesion. The main problem is the surface condition. Plasma thermochemical surface treatments are beneficial in that they can be carried out with a high degree of control of gas mixtures and limit or exclude any unwanted surface products such as Comound (white) layer in Nitriding.

However,even with this amount of control, in practice, it is advised to polish the surface prior to coating.

richard buster
Richard Buster
- Wolverhampton, United Kingdom

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.