Corrosion on mild steel ground surfaces 2

[alr]

I have a test apparatus to make which uses 12mm plough ground mild steel plates. The current apparatus they have gets an unsightly covering of light rust when not being used, I have suggested a dewatering fluid such as CRC, but this picks up dust.

The apparatus is inside a laboratory building in South Australia, so the humidity is low.

This is more about looking pretty than serous corrosion prevention. Can anyone suggest a suitable economical process or spray?

 

[Ron]

You can apply a rubbing wax (carnauba or similar);however, this will need frequent rejuvenation.

You may also coat the plate with a clear acrylic or lacquer coating. This will be durable as long as there is no abrasion on the plate in the testing process. The plate may either be sprayed or dipped in the coating.

Another possibility is to use a passivation wash (phosphatizing wash) to make the surface more corrosion resistant. You may also use an electrolytically applied coating, similar to that used for corrosion resistant screws/nails. Galvanizing is another possibility.

 

[CESSNA1]

AIR: Can you plate them? Either chrome or nickel plate can be used.
Regards
dave

 

[MikeHalloran]

1. Gun blue. The cold process stuff works okay if you get the pieces clean enough. Looks nice, too. Don't get your fingers in the soup; they'll look and smell funny for days.

2. PAM brand cooking spray, original flavor (lecithin). Not the olive oil flavored variety, which is actually just olive oil.



Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA

 

[unclesyd]

If you can get a can of Molykote Metal Protector it will do an excellent job. This is the standard for precision or one off parts.

http://www.dowcorning.com/applicati...ch.aspx?searchfor=metal protector&country=USA

 

[CMcF]

What about cathodic protection (if cathodic is a real word). I mean giving the plates a negative charge.

 

[Cockroach]

Case harden by liquid nitration, depth is typically 0.003/0.005 inches or so. Alternatively, zinc phosphating may do the trick, I prefer nitration since the hardnesses increase to about HRc 50-55 or so.

I guess you could also change material, but that would depend on the application and economics.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada