I have a particular machine where soluble oil/metalworking fluid has dried out in the sump. How do I remove the dried out stuff to prevent clogging of the fluid system with the remnants of the old dried out stuff.
Ignoramus8543 fired this volley in news:f7qdnWj8f4r7SUDPnZ2dnUVZ firstname.lastname@example.org:
Hot TSP solution will not only soften and remove the old stuff, but also clean the metal of the tank.
Make up a strong solution -- say a cup TSP per gallon, and heat it up to near-boiling, either in a separate pot or in the tank with an immersion heater. Let it work for as long as you can stand. A couple of days of soaking will get it all pretty much limbered up and removable.
If it really has oxidized/polymerized, TSP would be my distant 2nd choice. Lye would be much better; 1 lb/g or stronger.
Lye is much harder to find. It used to found in hardware stores, e.g., Red Devil brand, for cleaning drains. But it was being used in drug mfg, IIRC, and isn't carried anymore. I get mine online, from a soap-making supplies place.
If you're going to use it for something other than drain cleaning, do a test first. I once tried to use Drano as a paint remover, cause I had used lye to do it and I thought Drano was just lye. It was a disaster - there was some other ingredient in the Drano that contaminated the work.
This does work well, but do it outside, even if the weather is unpleasant.
Ether fumes are extremely flammable, and if used in a basement, may find their way to the pilot of the gas-fired hot water heater and explode. Or be set off by the spark in a light switch or a control relay.
whit3rd fired this volley in news:45a8eead-9f88-4d08- email@example.com:
Dilute lye can be used on it, too (for a time). Hot, concentrated TSP is quite corrosive to aluminum; enough so that it's sometimes used as a prep etch alone or in combination with other etchants, because it also acts as a surfactant to wash the item clean after etching.
All sorts of things, actually, can vigorously attack aluminum because of where it is on the electromotive series. Lest you think I'm crazy, let me warn you that this is not obvious -- but water with a pH just barely basic of neutral attacks aluminum VIGOROUSLY under certain circumstances; so vigorously that it can cause substances to heat to the point of ignition.
All of us pyrotechnics guys are aware of the dangers of water and aluminum. There have been numerous fires, many burns, and a few deaths because of it.