what is the reason of corrosion problems?
Q. I work with metalworking fluids,oils and they are used in grinding,honing,lapping.t hreading etc. operations. But,rust and corrosion problems has started in some machines. How can i chase the rust?or how can i stop the rust? please help me..
Asked by charmy - Wed Sep 12 03:46:41 2007 - - 2 Answers - 0 Comments

A. Rust is caused by metals oxidizing (a gain in oxidation state - ie, native Fe changes to Fe 2+ or 3+). Many metals form oxides, but iron is the most notorious. Adding acid can sometimes remove oxides, but it doesn't entirely repair the lost layer of metal. The oxidation is caused by exposure to air and water, which interact with the metal atoms to change their electronic oxidation state. Therefore, if the metal can be protected in some way from water, than it will be safe. You might try adding grease or wax to the top layer. Water hates oily substances and will not penetrate them. You have to determine if this will be feasible for your machines. Good luck.
Answered by tranquilitti - Wed Sep 12 03:57:16 2007

Is there any better water other than tap water to mix with car coolant for the 50% mix?
Q. This site suggests: "Tap water contains minerals that can harm your coolant" I was just wondering if there was a better form of treated / pure / distilled / evian water to use? Thanks.
Asked by Joe Bloggs - Tue May 22 09:55:51 2007 - - 10 Answers - 0 Comments

A. You should never use tap water in a radiator under any circumstances. The easiest method would to be buying the pre-mixed antifreeze. It is already at the right 50/50 concentration and can be used as it comes out of the bottle. I know what you are thinking, "Why would I pay for water?". The answer is the same reason you buy bottled water to drink. If you insist on buying the concentrate and mixing your own, use distilled water.
Answered by oklatom - Tue May 22 10:04:25 2007

Air compressor needed?
Q. I allready have a huge tanked oil compressor in my shop for metalworking tools but want to get a small 2 - 4 gallon unit for the woodworking shop in the basement. I have heard oiled units last longer so I want to try and stick with those if they have them for these smaller units. Whats a good unit to get? My price range: $60 - 150 Gallons needed: 2 - 4 Input voltage: 110/120 single phase *If possable, an oil unit as they last longer I normally would just go to harborfreight.com but I never trust anything from them that ill be using and want to last long... I'll be using this compressor to just blow sawdust off the woodworking tools and all every now and then and dont want a motor running all the time...Thats why I like the tank models. [cont.]
Asked by D S - Wed Sep 27 09:48:21 2006 - - 1 Answers - 0 Comments

A. I swear by Sears Craftsman.
Answered by macheen852 - Thu Sep 28 00:38:04 2006