Godfrey DiGiorgi wrote: > On Aug 14, 2007, at 6:59 AM, keith_w wrote: > >>> Tell that to the people whose engine blocks needed stripping and >>> rebuilding, Mark. >>> >>> G
>> That comment is just a teeny bit obscure, GDG... >> Elucidate a little? > Several of the jobs I did in years past had to do with people who had > built up an engine (short blocks or complete)... Steel or aluminum? >...liberally sprayed it > with WD40 thinking it would be protected from corrosion, and left it > in their garage storage area... Inside or outside? >... for when they would get back to it for a project they were > working on. How long stored (left without attention)? > The water which accumulated into the > WD40 through humidity corroded the cylinder walls, to the point where > when they pulled the engines out of storage to start the final > assembly, they needed to be completely stripped down and refinished, > in a couple of cases new cylinder sleeves installed. I got the ones > that needed installation of cylinder sleeves as I had the connections > to do that job pretty efficiently at one time. > > Godfrey I'm unable to explain that phenomenon, Godfrey. WD-40 was formulated to be miscible with petroleum oil, to be water displacing (which it demonstrably does) and it's very low viscosity (thinner than water) allows it to creep into the smallest crevices. One would think it would protect instead of allow corrosion. I see no evidence it's deliquescent, if that can be applied to a liquid... WD-40 contains 15-25% petroleum based oils. All the other carrier fluids serve to carry and distribute the oils around... I'll keep reading. Interesting subject. We may even get rid of some pre-conceptions here! <g> keith whaley -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
