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amagicalwizard t1_jb2u46h wrote

Reply to comment by Flaxatron in Does galvanic corrosion take place when aluminum bronze is in contact with steel? by UserNo485929294774

Just thought I'd add that it's not just metal to metal contact that can cause galvanic corrosion. When working with carbon fibre composites the nobility of metals that are in contact/inserted are of concern as they will likely galvanically corrode due to the conductivity of CFRP.

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Bunsen_Burn t1_jb3jo8m wrote

Carbon fiber always gets people.

Got called in to consult with a development team that was having paint issues. Their brilliant plan which they had spent the last six months perfecting was changing out glass fibers for carbon fibers in an injection molding system. Which is fine and dandy except they also:

Vibromelted brass inserts into the plastic in order to secure the lid to the body with cadmium coated steel bolts and then sprayed the entire interior with an EMI coating witch was 92%wt silver.

It was hilariously bad. The piece was supposed to pass 168 hours salt fog with no visible signs of rust. The first check was 18 hours into the run and not only was there corrosion products running off the side, it was red rust from the steel.

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rogerarcher t1_jbrmmbo wrote

How did they fix it?

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Bunsen_Burn t1_jbt0esn wrote

The program was supposed to be a drop in replacement upgrade. When they realized they would need to start making serious changes to fasteners and other equipment they just killed the entire thing. The changes they would of had to make were far outside the scope of their original intent and they were basically out of project money.

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