Moldable Iron Powder
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From: Jerry Avins on 23 Nov 2009 17:50 Jerry Avins wrote: > Tim Wescott wrote: >> On Mon, 23 Nov 2009 13:55:37 -0500, PeterD wrote: >> >>> On Mon, 23 Nov 2009 12:41:46 -0600, Tim Wescott <tim(a)seemywebsite.com> >>> wrote: >>> >>>> A long-term back-burner project just got my attention when I found out >>>> that Home Depot sells magnetic paint. >>>> >>>> >>> Interesting! What is it called, and is there a web reference? >> >> Searching on "magnetic paint" on the Home Depot or Rust-Oleum sites >> should get you there. > > It's either soft iron, or it needs a strong field to polarize it. How is > it used? (IIRC, the permeability of ceramic magnets id low, so they > support large gaps too.) From what I found searching, it's soft. that is, magnets are attracted to it, but it's not attractive on its own. Jerry -- Engineering is the art of making what you want from things you can get. ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
From: Tim Wescott on 23 Nov 2009 18:32 On Mon, 23 Nov 2009 17:50:19 -0500, Jerry Avins wrote: > Jerry Avins wrote: >> Tim Wescott wrote: >>> On Mon, 23 Nov 2009 13:55:37 -0500, PeterD wrote: >>> >>>> On Mon, 23 Nov 2009 12:41:46 -0600, Tim Wescott >>>> <tim(a)seemywebsite.com> wrote: >>>> >>>>> A long-term back-burner project just got my attention when I found >>>>> out that Home Depot sells magnetic paint. >>>>> >>>>> >>>> Interesting! What is it called, and is there a web reference? >>> >>> Searching on "magnetic paint" on the Home Depot or Rust-Oleum sites >>> should get you there. >> >> It's either soft iron, or it needs a strong field to polarize it. How >> is it used? (IIRC, the permeability of ceramic magnets id low, so they >> support large gaps too.) > > From what I found searching, it's soft. that is, magnets are attracted > to it, but it's not attractive on its own. > > Jerry Right. I'm looking for an armature material for an oddball electromagnet -- big, light (well, relatively), and capable of supporting a significant AC component without wasting it all as heat. -- www.wescottdesign.com
From: PeterD on 23 Nov 2009 19:05 On Mon, 23 Nov 2009 13:35:38 -0600, Tim Wescott <tim(a)seemywebsite.com> wrote: >On Mon, 23 Nov 2009 13:55:37 -0500, PeterD wrote: > >> On Mon, 23 Nov 2009 12:41:46 -0600, Tim Wescott <tim(a)seemywebsite.com> >> wrote: >> >>>A long-term back-burner project just got my attention when I found out >>>that Home Depot sells magnetic paint. >>> >>> >> Interesting! What is it called, and is there a web reference? > >Searching on "magnetic paint" on the Home Depot or Rust-Oleum sites >should get you there. http://www.rustoleum.com/CBGProduct.asp?pid=127, nothing came up with the suggested search terms however.
From: Glen Walpert on 23 Nov 2009 20:18 On Mon, 23 Nov 2009 16:32:26 -0600, Tim Wescott <tim(a)seemywebsite.com> wrote: >> On Nov 23, 10:41 am, Tim Wescott <t...(a)seemywebsite.com> wrote: >>> A long-term back-burner project just got my attention when I found out >>> that Home Depot sells magnetic paint. >>> >>> The paint got me thinking -- if they can make latex paint with iron >>> powder in it, can I buy some sort of plastic resin with iron powder in >>> it and make my own custom magnetics on the cheap? Devcon A is the original epoxy filled with a high percentage of "steel" of some sort. It was around in the 60's and is still available: http://www.freemansupply.com/PlasticSteelPuttyD.htm - first source googled, I never used them. There are now others, turned up with search on "iron filled epoxy": http://www.freemansupply.com/IronFilledEpoxyCas.htm None of which discuss magnetic properties, but you could try calling the mfgrs.
From: Michael A. Terrell on 24 Nov 2009 02:05
Tim Wescott wrote: > > If you could give me a list of the brands that you're familiar with I'll > go check specifications myself, thanks. http://jbweld.net/products/jbweld.php lists 'liquid steel' as one part of their epoxy. Who knows what they mean? -- The movie 'Deliverance' isn't a documentary! |