Coolant hose failure revisited

[Rick Parker]

Hot News About Coolant Hose Failure - Hose - Products | Gates Corporation

[xb-60]

Originally Posted by Rick Parker

Hot News About Coolant Hose Failure - Hose - Products | Gates Corporation

Rick - I would be a little skeptical about this one. Galvanic corrosion occurs when there are dissimilar metals and an electrolyte present. The resulting potential difference (voltage difference) between the two metals causes a current flow through the electrolyte (coolant) and a degradation of the anodic metal in the couple. I don't see how the inside of the hose could be affected, as the hose can't act as an anode.
If the hoses were reinforced with a metal mesh, and the hose degraded with age, allowing access of the coolant and therefore allowing a galvanic cell to operate, then maybe.....
Anybody know if some hoses have metallic reinforcing?
Cheers,
Glen

[Tom Wells]

Rick,

Interesting stuff.

Gates first identified this problem in the mid eighties.

Dunno if the EPDM is slightly conductive or not - might be an interesting thing to Google.

Here's a place to start: http://www.ncbi.nlm.nih.gov/pubmed/18676003

And here: http://adsabs.harvard.edu/abs/2010IJMPB..24.2597K

Tom