-- The Home Page of the Finishing Industry

on this site
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 32539

De-embrittlement after nickel plating


Are there any requirements into the max time allowed between nickel plating and heat treatment for de-embrittlement. We try to complete this within a few hours, but sometimes this is difficult due to production volumes, I'm sure the longer you leave it the more hydrogen impregnates the base material, but what are the safe guidelines and where is this documented.

Lee Franckeiss
Component repair - Southampton, Hants, England


Some specifications will give time limits. It depends! How hard is the parts that are plated. For practical purposes, the higher the hardness, the quicker it needs to get into the oven. Production volume is a poor excuse for not doing what is right. If you are plating Rc55 4340, you better get it into the oven ASAP. If you are going to fudge times, you probably should run daily notch bar tests with whatever batch will take the longest time between plate and bake. We used 15 mins from dry off to oven and never had a failure in several years of nickel plating and used notch bars with a tensile strength of nearly double what we were routinely plating.

James Watts
- Navarre, Florida


Post plating heat treatment information is given in BS ISO 9588. There is a lot of other info on-line and in text books, etc.

Basically though, the previous answer is correct, the requirement for de-embrittlement is highly dependent on tensile strength and therefore hardness, any strength <1000 N/mm2 being not normally necessary. The treatment is time and temperature dependent, and should be carried out preferably within one hour of plating.

Best of Luck.

Martin Rich
DML - Ship Repair - Plymouth, England

If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT 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

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.