×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Corrosion rate of tin coating
2

Corrosion rate of tin coating

Corrosion rate of tin coating

(OP)
Hi!

I'm trying to find information about the corrosion rate of tin coating, especially in seacoast atmospheres.

Does anyone know where I can find that information?

Thank you beforehand.


Richard

RE: Corrosion rate of tin coating

2
After some research, I was able to locate one reference that mentions the porosity of electroplated tin on steel. Under exposure to atmosphere, the steel becomes more negative in potential (anodic), thus causing rust to form in pores thru the tin plate (older cans exposed to humid air would develop rust). When the cans were sealed during food processing, the tin would become more negative in potential because of oxygen deficiency and prevent corrosion of the steel can. The steel can would behave as the cathode.

Depending on the quality level of the tin coating, I found a reference that provides corrosion rates of tin (this would be tin metal) in a marine environment. The corrosion rate over a 10 year exposure period was 9 mils/year (page 166, "Corrosion and Corrosion Control", by UHLIG). Keep in mind this is for tin metal and if a coating could be applied that is solid tin, you could probably use the corrosion rate listed above. Otherwise, a tin plate that is not properly applied or contains small pores will probably suffer the same fate as the tin plated can.

The key I believe is to have a dense layer of tin coating so that tin acts as the anode and corrodes versus the substrate material.

RE: Corrosion rate of tin coating

(OP)
Thank you.

Richard

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources