View Full Version : Alum versus Tap versus Corningware

Gary Helmick
12-05-2004, 09:34 AM
On a thread a while back someone asked how to remove a broken tap.

There were a lot of good answers but one that I researched and wanted to try was the use of Alum.

Well to tell the story, it worked!! http://bbs.homeshopmachinist.net//biggrin.gif But now I have a new problem. http://bbs.homeshopmachinist.net//confused.gif

I was working in some aluminum and got in to much of a hurry in tapping for 8-32. As luck would have it, I broke a tap. http://bbs.homeshopmachinist.net//mad.gif

Now what do I do?

Well I come to the frendly Home Shop Machinist mag web site and do a search and find someone posting about using Alum to eat away the tap.(And it does) http://bbs.homeshopmachinist.net//smile.gif But they didn't say how long this was going to take. http://bbs.homeshopmachinist.net//frown.gif

I didn't really time it, but it took probably at least 8hrs to cook this tap out of my prized project. http://bbs.homeshopmachinist.net//eek.gif

This still wasn't the reason I am posting this item. My problem now is, how do I get this Alum out of the Corningware I borrowed from my wife? http://bbs.homeshopmachinist.net//eek.gif

I am still trying, with no sucess yet, but me think that it would have been easier to have started the project over!! http://bbs.homeshopmachinist.net//biggrin.gif

Gary Helmick

Spin Doctor
12-05-2004, 11:10 AM
Go to the store buy a new one and bury the old very very deep

12-05-2004, 11:30 AM

I sympathize with you. I remember putting sulphuric acid in one of my wife's glass baking bowls. She had a fit. Didn't understand the reasoning, I guess. I explained that I'd wash it after use, but that wasn't sufficient for her.....go figure?? She also didn't believe me when I said that I thought the "frosted" bowl looked better.

Afterwards, I bought some glass containers at a flea market, for my projects. She never borrows my stuff.......

BTW......Never put water into acid. Always put acid into water.


12-07-2004, 09:54 AM
<font face="Verdana, Arial" size="2">Originally posted by Spin Doctor:
Go to the store buy a new one and bury the old very very deep</font>

I found broken dishes buried in my back yard while digging a trench. http://bbs.homeshopmachinist.net//rolleyes.gif http://bbs.homeshopmachinist.net//biggrin.gif

12-07-2004, 10:27 AM
Quick and check the internet for the nearest corningware outlet store near you, or where you can order various patterns from Corning. there are also some "re-sellers' of old pattern corning ware out there.

Meanwhile, you kind of "hide" the dish.