Hi all,
I am currently using WD-40 Specialist Electrical Contact Cleaner spray for applications that exceeds 120°C.
Today I noticed that the boiling point of this product is 152-180°F, which is eqivalent to 82°C. The spray is only applied to the contacts at ambient temperatures, but are then immediately exposed to temperatures above 120°C.
Can this have any effect of the contacts?

 

The bulk boiling point of the WD40 product may have no relationship to the working temperature of any residue ("lubricant") that is left. A mixture of mostly volatile liquid with a small amount of less volatile liquid will boil at a temperature much less than the boiling point of the less volatile liquid and closer to the BP of the more volatile component.

In the experiment you propose, the volatile carrier should evaporate quickly and not adversely affect the contacts. Be sure not to do that in a closed vessel. However, if the application temperature of the carrier is well above its boiling point, the boiling may be vigorous. That is probably not a problem.

John