Copper chloride corrosion of GFN 30%

[dom253]

Does anybody have any experience of glass filled nylon 30%, being degraded by copper chloride. The GFN components are basically turning so soft you can crumble them between your fingers.

I have an application where there purified water is used as a coolant. The purified water is chlorinated (to kill bacteria i expect). The system runs at around 40-60 degrees C, and a lot of copper piping is used in the heat exchanger to cool the reverse osmosis water. Also 7-8 barg pressure

A few things ring bells; chlorinated water, elevated temp, pressure and copper piping. Would the purified water leach minerals from the copper pipe, which would in turn mix with the copper causing copper chloride? I believe GFN and copper chloride are a no no. How bad would the corrosion be?

 

[unclesyd]

Is the problem all over or near where you add the Chlorine?

Hypochlorous acid will work on nylon. Also nylon will hydrolyze under certain conditions. I don't have any reasouces to call on to wee if Cu+ your other conditions would be condusive to hydrolysis.
For your information small amounts of Copper salts are added to molten nylon for heat stability of the finished product.