X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ispmxmta09-srv.windstream.net ([166.102.165.170] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2145629 for flyrotary@lancaironline.net; Thu, 28 Jun 2007 10:42:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.170; envelope-from=montyr2157@alltel.net Received: from ispmxaamta04-gx.windstream.net ([71.29.244.101]) by ispmxmta09-srv.windstream.net with ESMTP id <20070628144205.GEDQ3155.ispmxmta09-srv.windstream.net@ispmxaamta04-gx.windstream.net> for ; Thu, 28 Jun 2007 09:42:05 -0500 Received: from Thorstwin ([71.29.244.101]) by ispmxaamta04-gx.windstream.net with SMTP id <20070628144205.OQG23532.ispmxaamta04-gx.windstream.net@Thorstwin> for ; Thu, 28 Jun 2007 09:42:05 -0500 Message-ID: <001901c7b992$7fef2010$6501a8c0@Thorstwin> From: "M Roberts" To: "Rotary motors in aircraft" Subject: Amazing Transformation Date: Thu, 28 Jun 2007 09:42:06 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C7B968.96EE3780" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0016_01C7B968.96EE3780 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Muriatic acid, (Hydrochloric acid) is available at builders supply = stores. Used to etch concrete prior to painting. This is 2% Hydrochloric = in water. Light yellow color. Stay out side for this one. Stay up wind. = Wear rubber gloves and eye protection. Use only plastic containers. Only store in the original container. = Dissolves oxides of iron completely. Dissolves most nonferrous=20 metals. You will need to replace the rotor bearings. Works like magic. = Rinse with water and baking soda mixture.to neutralize acid. Done over limestone gravel spills will dissolve into gravel and be = neutralized.=20 Lower (washed of oil and grease), rusted part into acid. Cover and let = stand for several hours. No rust will be left on the part. Lynn E. Hanover=20 Lynn, I actually did know the hydrochloric acid trick. Nasty stuff. Actually the way I discovered the battery charger trick was a variation = of the muratic acid trick. You take muratic acid and dilute it further. = Like 2 cups for 5 gallons of water. It makes for a less hazardous = solution to work with. Then you take a piece of wire and connect the = rusty part to a scrap of aluminum. You put both in the weak acid bath. = You now have a battery. The aluminum becomes the sacrificial anode and = the rust is dissolved from the part.=20 The problem is acid does not remove carbon or grease so you have to get = all of that off beforehand or it acts like a mask for etching.=20 The other problem is the acid will attack the base metal so you have to = keep a close eye on it.=20 The really nice thing about the battery charger and washing soda trick = is the washing soda is a detergent and a caustic which will remove = grease. Also the solution is much nicer to work with. You can leave it for as long as you like and none of the base metal will = be removed. Actually the two work really well in combination. You use the caustic = bath to remove the rust etc. Then you hose off most of the black = magnetite. Then you put it in the acid bath for a few minutes to get all = of the magnetite out of the pits on the part. Then you hose it off = again. Then you put it back in the caustic bath to neutralize the acid = and passivate the metal. Having used both methods, I like the washing soda for ease of use and = lack of nasty byproducts. Monty ------=_NextPart_000_0016_01C7B968.96EE3780 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Muriatic acid, = (Hydrochloric=20 acid) is available at builders supply stores. Used to etch concrete = prior to=20 painting. This is 2% Hydrochloric in water. Light yellow color. Stay out = side=20 for this one. Stay up wind. Wear rubber gloves and eye=20 protection.
 
Use only plastic = containers. Only=20 store in the original container. Dissolves oxides of iron = completely.=20 Dissolves most nonferrous
metals. You will = need to replace=20 the rotor bearings. Works like magic.  Rinse with water and = baking=20 soda mixture.to neutralize
acid. Done over = limestone gravel=20 spills will dissolve into gravel and be = neutralized. 
 
Lower (washed of = oil and grease),=20 rusted part into acid. Cover and let stand for several hours. =  No=20 rust will be left on the part.
 
Lynn E.=20 Hanover 
 
Lynn,
 
I actually did know the hydrochloric = acid=20 trick.
 
Nasty stuff.
 
Actually the way I discovered the = battery=20 charger trick was a variation of the muratic acid trick. You take = muratic=20 acid and dilute it further. Like 2 cups for 5 gallons of water. It makes = for a=20 less hazardous solution to work with. Then you take a piece of wire and=20 connect the rusty part to a scrap of aluminum. = You put both=20 in the weak acid bath. You now have a battery. The aluminum becomes = the=20 sacrificial anode and the rust is dissolved from the part.
 
The problem is acid does not remove = carbon=20 or grease so you have to get all of that off beforehand or it acts = like a=20 mask for etching.
 
The other problem is the = acid will attack=20 the base metal so you have to keep a close eye on it.
 
The really nice thing about the battery = charger and=20 washing soda trick is the washing soda is a detergent and a caustic = which will=20 remove grease. Also the solution is much nicer to work = with.
 
You can leave it for as long as you = like and none=20 of the base metal will be removed.
 
Actually the two work really well in = combination.=20 You use the caustic bath to remove the rust etc. Then you hose off most = of the=20 black magnetite. Then you put it in the acid bath for a few minutes to = get all=20 of the magnetite out of the pits on the part. Then you hose it off = again. Then=20 you put it back in the caustic bath to neutralize the acid and passivate = the=20 metal.
 
Having used both methods, I like the = washing soda=20 for ease of use and lack of nasty byproducts.
 
Monty
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