Duplex / Carbon steel connection

[dinsjoerd]

Hellow,

We have a rotating part made of Duplex which is fitted with 2 spherical roller bearings.
The roller bearings are protected from splash water etc with bearing coverplates and V-rings. However does there always manage to migrate some water into the bearingcavity.

Due to the Duplex rotating part and the spherical roller bearings which stand in direct contact we get a galvanic corrosion.

Does anybody have tips how to get rid of the connection between the stainless and c-steel part? Any coatings etc?
Keep in mind that the bearings are being installed with a tight Fit due to the heavy load.

 

[EdStainless]

What kind of water is splashing?

My first thought is a synthetic grease with corrosion inhibitors in it. Look here

http://www.dupont.com/lubricants/en/products/greases.html

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Rust never sleeps
Neither should your protection

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[kenvlach]

Make the bearings of Custom 465® stainless from Carpenter.

http://cartech.ides.com/datasheet.aspx?i=103&e=55&c=TechArt

 

[EdStainless]

Hold on, the bearing races are in contact with the stainless, the rollers only contact the races, right?
What is corroding?
The galvanic corrosion would be where the stainless and the steel meet. This should be the outside of the bearing.
If your rollers are in contact with the stainless, then they also need to be stainless, as well as the mating race.
Custom 465 has better hardness and corrosion resistance than almost any other PH grade stainless.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm