finishing.com -- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 8442

De-embrittlement Chrome Microcracking


2001

Microcracking of Chrome plating and de-embrittlement

Does anyone know of the relationship and solution of possible hydrogen absorption and surface cracking.

Does standard de-embrittlement heat treatment work with low density microcracking.

Also with Cr110 plating solutions has anyone had any experience with the tensile notch test being applied to such Vats

Any information would be very much appreciated.

Bernard Irving
- United Kingdom


2001

Hi Bernard.

Micro cracks it's what we like to have in a chrome deposit. This cracks is better to binding oil when you use hardchrome for cylinders etc and it also a very good corrosion protection because microcracks is a bigger anodic surface. Microcracks in a deposit have a higher anodic protection than macrocracks. From a Sargent's Chrome solution or a high speed chrome solution you can eliminate macrocracks if you use a low sulfuric acid and high chrome and it's also depends which current density you use. Macrocracks will also arise from parts which have a higher Rockwell C over 50. It's also important to shotpeening and bake with 135 °C at least for 2 hour before and after plating. A bad grinding can also give macrocracks.

Regards

anders sundman
Anders Sundman
3rd Generation in Plating
Consultant - Arvika, Sweden




If you have a question in mind which seems off topic, please 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 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.