Corrosion prevention on carbon steel container

[goppo]

Hello all,

I am dealing with the supply of a painted mild steel container for offshore use & need to affix 316 stainless steel components/bolts on internal panels (painted mild steel) of the unit.

We are using rivet nuts and am unsure whether to go for stainless steel or zinc plated rivnuts through the drilled holes.

Any advice on the matter would be greatly appreciated.

Thx

 

[CoryPad]

You are going to have galvanic corrosion between the stainless steel and the carbon steel components, regardless of which ones they are. So, you will need to decide which parts are most suited (doesn't affect safety, easiest to replace, lowest cost, etc.) if corrosion happens.

I would think a zinc plated rivnut would be better in the painted steel panel.

Any chance to isolate the carbon steel and stainless steel components (PTFE washers, spacers, etc.)? I don't recommend polymeric components in the clamped region of the joint (preload loss due to creep).

 

[strider6]

if they are on the inside of the container i'll less concerned with galvanic corrosion. is the container conditioned?

S

Corrosion Prevention & Corrosion Control