Metal Casting Zone Info Blog » Chemistry

why wouldn\’t this work for getting impurities from gold during melting with mapp gas:?

Ivan Irons — Tue, 23 Dec 2008 21:20:08 +0000

jemrx2 asked: I’ve probably spent too much time staring at the glowing little egg and breathing too many fumes, but for years now I ve melted gold in some old pottery crucibles. Ive had some luck with sticking the tip of a stainless steakknife in the molten gold and slowly sifting-out little pieces of metal [...]

why wouldn\’t this work for getting impurities from gold during melting with mapp gas:? is a post from: Metal Casting Zone Info Blog

how can i test different scrap metals to find out what type they are?

Ivan Irons — Wed, 17 Dec 2008 20:57:36 +0000

rgp53 asked: i want to sell my scrap metal to a scrap yard. i am not sure if it is aliminum or cast metal of a different type. is there a test to determine the differnt types of metals? i know you can use a magnet to determine if ferrous or non-ferrousBack Yard Metal Casting [...]

how can i test different scrap metals to find out what type they are? is a post from: Metal Casting Zone Info Blog

What solids can hydrogen migrate through?

Ivan Irons — Fri, 21 Nov 2008 03:01:41 +0000

fieroturbo asked: I’m not a metalurgist by any means, so bear with me. I know hydrogen has a tendancy to migrate through metal and make it brittle. Would this still occur on ceramic coated metal, or maybe even cryo-treated metal? The metal in question by the way is cast aluminum.Brass Metal Casting What solids can [...]

What solids can hydrogen migrate through? is a post from: Metal Casting Zone Info Blog

Chemical (acid?) to soften a niche or concrete so hard to break?

Ivan Irons — Sat, 15 Nov 2008 11:38:09 +0000

dalton asked: I’ve seen a round concrete with more or less 4 meters in diameter and about 18 inches thick broken into 3 from a foot of a mountain. Visible from one piece are 7 empty casts probably from gold bars and 2 empty cast contained probably metal box measuring 6 x 6 x 12 [...]

Chemical (acid?) to soften a niche or concrete so hard to break? is a post from: Metal Casting Zone Info Blog

substance which solidifies, when solid, has hight thermal conductivity and can withstand high pressure force?

Ivan Irons — Wed, 12 Nov 2008 22:56:51 +0000

cndags asked: is there any substance or composition that i can use to substitute to our steel mould making process to avoid machining steel to make rubber vulcanization moulds? instead, i could make these moulds in the for of casting them to produce te mould? i would like to find any substitiute for metal, which [...]

substance which solidifies, when solid, has hight thermal conductivity and can withstand high pressure force? is a post from: Metal Casting Zone Info Blog

Why does cast iron not rust?

Ivan Irons — Fri, 07 Nov 2008 16:08:55 +0000

bud asked: I noticed in a junk yard that the engine castings, and brake rotors just showed surface rust and can be machined. Sheet metal parts where rusted through. Also I heard that cast iron filings are good for the garden, not steel filings. Is this true? ThanksMetal Casting Zone Why does cast iron not [...]

Why does cast iron not rust? is a post from: Metal Casting Zone Info Blog

substance which solidifies, when solid, has hight thermal conductivity and can withstand high pressure force?

Ivan Irons — Thu, 06 Nov 2008 03:32:09 +0000

substance which solidifies, when solid, has hight thermal conductivity and can withstand high pressure force? is a post from: Metal Casting Zone Info Blog

Why does cast iron not rust?

Ivan Irons — Wed, 29 Oct 2008 05:28:02 +0000

Why does cast iron not rust? is a post from: Metal Casting Zone Info Blog

why wouldn\’t this work for getting impurities from gold during melting with mapp gas:?

Ivan Irons — Sun, 12 Oct 2008 10:08:10 +0000

why wouldn\’t this work for getting impurities from gold during melting with mapp gas:? is a post from: Metal Casting Zone Info Blog

How to get epoxy out of a mould?

Ivan Irons — Thu, 09 Oct 2008 18:50:53 +0000

Lucas asked: I need to cast some epoxy using a metal mould. I have some serious difficulties removing the epoxy once it has cured. I have tried coating the metal with silicone oil, hair spray and Teflon (PTFE) spray. Nothing has helped. What should I use to coat the metal surface in order to easily [...]

How to get epoxy out of a mould? is a post from: Metal Casting Zone Info Blog

Strongest alloy for casting?

Ivan Irons — Fri, 12 Sep 2008 05:14:29 +0000

lol wut asked: if you wanted to manufacture cast metal tools with the highest strength and heat/corrosion resistance, what metal or alloy would you use?Bronze Metal Casting Strongest alloy for casting? is a post from: Metal Casting Zone Info Blog

Strongest alloy for casting? is a post from: Metal Casting Zone Info Blog

Smelting and casting wood\’s metal?

Ivan Irons — Thu, 11 Sep 2008 02:22:24 +0000

Professional Eschatologist asked: I have a crap ton of wood’s metal that I want to divy up and sell. However, whenever I melt it, some of it turns to black sludge, which is hard to seperate from the metal itself. How can I stop this?Home Metal Casting Smelting and casting wood\’s metal? is a post [...]

Smelting and casting wood\’s metal? is a post from: Metal Casting Zone Info Blog

Chemical (acid?) to soften a niche or concrete so hard to break?

Ivan Irons — Mon, 08 Sep 2008 03:13:33 +0000

Chemical (acid?) to soften a niche or concrete so hard to break? is a post from: Metal Casting Zone Info Blog

When people refer to \”Blacking Iron\” what is the procedure?

Ivan Irons — Sun, 31 Aug 2008 12:05:37 +0000

Bluebird asked: I have some old cast iron I want to get the rust off of and make the metal black, rust free.Metal Casting Basics When people refer to \”Blacking Iron\” what is the procedure? is a post from: Metal Casting Zone Info Blog

When people refer to \”Blacking Iron\” what is the procedure? is a post from: Metal Casting Zone Info Blog

substance which solidifies, when solid, has hight thermal conductivity and can withstand high pressure force?

Ivan Irons — Sun, 10 Aug 2008 03:03:36 +0000

substance which solidifies, when solid, has hight thermal conductivity and can withstand high pressure force? is a post from: Metal Casting Zone Info Blog

Chemical (acid?) to soften a niche or concrete so hard to break?

Ivan Irons — Sat, 09 Aug 2008 17:21:31 +0000

Chemical (acid?) to soften a niche or concrete so hard to break? is a post from: Metal Casting Zone Info Blog