We have a system that has a polished aluminium surface pressed onto a smooth copper coated ceramic one.
Because of differential thermal expansion the aluminium will spread radially and pull the ceramic into tension.
We think we need to have a low enough coefficient of friction between the two...
We have a cooling system problem where 60 degree cone type fittings are leaking. We have systems that do not leak, and the common factor appears to be Ethylene Glycol in the systems that leak. The coolant is de-ionised water at about 0.5uS/cm.
I have heard that both de-ionised water and glycol...
On the theme of static discharge hazards, we have another problem that is related.
We are transporting a mineral oil in silicone rubber hosing and are experiencing static build-up.
The hose joins two stainless steel fittings which are earthed, but the static is discharging from the middle of...
