finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsBooksHelpWantedAdvertiseForum
topic 11277

Stainless steel seized with aluminum after corrosion test for automotive industries


 

We recently have a problem which we think it may be due to a galvanic reaction. A stainless steel 416 fitting was interface with an Aluminum ABS module. After corrosion test, male fitting was seized and cannot be removed or removed at high force. Do you know why? Thanks in advance.

Name redacted at writer's request
Ontario, Canada


 

But I am not at all surprised that aluminum would corrode under these conditions. Further, I would expect aluminum and stainless to seize anyway.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


 

Given the dissimilar metals, electrolyte (the corrosion testing solution), and capillary action between the parts, I think you're right on in thinking you have a galvanic cell. If changing materials of the parts is out of the question you may want to try a corrosion inhibitor that can be applied to the mating surfaces to inhibit both capillary action and corrosion. You'll still have the galvanic cell but the inhibitor will keep corrosion to almost nothing as long as it's present.

Jeff Watson
Jeff Watson
- Pearland, Texas



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 Q or A to THIS thread START a NEW THREADView This Week's 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


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.