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#1 |
Member
Join Date: Oct 2009
Posts: 59
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Evapo Rust sounds interesting because it's water based, it's supposed to be safe even for paint and rubber. I was told by the Indonesian importer that you can dump the whole engine piston with paint, rubber, and all into the solution, and all Evapo Rust does is remove Fe2O3 (rust) because it reacts with nothing else.
Wouldn't this be a good and thorough way to clean up the smallest rust particles? Any opinion why it might be not good for kerises? |
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#2 |
Member
Join Date: Jul 2005
Location: Tallahassee, FL
Posts: 131
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It will strip down to bare metal, and in my experience, yes it does etch further.
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#3 |
Vikingsword Staff
Join Date: Nov 2004
Posts: 6,284
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Pineapple juice (unsweetened) .
Also . Patience . ![]() |
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#4 | |
Member
Join Date: Apr 2012
Location: Maryland, USA
Posts: 112
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#5 | |
Member
Join Date: Jan 2012
Location: Tennessee
Posts: 11
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#6 | |
Keris forum moderator
Join Date: Aug 2006
Location: Nova Scotia
Posts: 7,085
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But consider this...this is also going to remove whatever current stain the blade holds. If you are not prepared to re-stain with arsenic/warangan then you might not want to go so far. If you only have some minor rust you might be able to remove it with some WD-40 and some gentle brushing. For the more complete job though you can find some basic instructions in this old thread: http://www.vikingsword.com/ubb/Forum1/HTML/000717.html |
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#7 |
Member
Join Date: Jan 2012
Location: Tennessee
Posts: 11
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Thanks for the information. Not sure I'm up to the task of re-staining my blade myself, so I'll probably try the WD-40 first. It was just a little rust...
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#8 | |
Member
Join Date: Jun 2009
Posts: 1,740
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I would like to report my personal experience as follows: I recently purchased an old kris panjang with a partly rusty and corroded blade (see top pictures). The rust was unevenly ditributed along the blade and in the form of a hard black crust. I decided to test the pineapple juice method for cleaning it (100% unsweetened juice from Costa-Rica). As the blade is 60 cm long I used a vertical container (PVC pipe with a bottom plug). During the first 2 days, the cleaning results were encouraging and about 50% of the rust was removed after regular scrubbing with a kitchen iron pad impregnated with a cleaning paste. However from the 3rd day, the progress became insignificant and absolutely nil after about 5 days so I decided to stop the procedure and replace the pineapple juice by undiluted white vinegar (8% vol). After few hours the results were already visible and after about 24 hours and few scrubbing procedures virtually all the remaining rust spots had disappeared and the overall cleaning result is satisfactory (see bottom pictures). As a conclusion, vinegar appeared much more efficient than pineapple juice for cleaning this particular blade and I tentatively explain it as follows: 1. The pineapple juice did not ferment at all during the whole period may be because the contact with air in the vertical container was minimal, so the juice was not enough acidic for removing the rust. Of course the juice pulp settled at the bottom of the container but there was no major difference of cleaning efficiency along the blade. 2. Contrary to most kris blades, this particular one has no pamor and is made from solid steel so it may be more difficult to clean it than blades made from mixed metals. Next time I will try citric acid (diluted at 10% in water) which is a recognized rust removing agent and which gave very good results on another Sumatra blade without pamor. Regards |
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#9 |
Member
Join Date: May 2006
Posts: 6,820
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Sulphuric acid is even more effective if speed is the criterion. Sulphuric acid will clean a blade in minutes. Aqua regia is even faster.
I used to use pure Queensland Pineapple juice. On a heavily rusted blade rust removal could take two weeks, but most of the rust was usually removed in the first couple of days. After that each time it was removed from the juice it was necessary to work over the blade with steel picks of various sizes from a bearing scraper to a saddler's needle and pick off the hard rust before putting it back into the juice. Then the Australia company "Golden Circle" was bought by an American firm. They stopped selling pure Queensland pineapple juice and started to import pineapple juice concentrate from South America. The stuff tastes like sh***, you'd need to be dying of thirst to drink it, and even then you'd probably think twice before letting it pass your lips. As for its use as a keris cleaner, well, it works for maybe two days, then it goes dead. I no longer use pineapple juice to clean blades, for the simple reason that I can no longer buy it. Even though Australia produces so many pineapples they sometimes get plowed back into the ground we have a profit driven international company importing pure concentrate of horse pi** from South America and trying to sell it to us as Pineapple juice. Be a cold day in hell before I buy another can of this garbage. You can't drink it, and its useless for cleaning purposes. Another international company did a similar thing with Arnotts Biscuits, who when they were a locally owned company used to produce what were arguable the world's finest mass produced biscuits. It took these business geniuses maybe 20 years, but they have finally got that biscuit company to the position where its share of super market shelf space has shrunk to the point where you almost can't see the brand any more. The quality of Arnotts Biscuits dropped to the point where nobody except those without taste buds buy them. Anyway, we don't use chocolate biscuits to de-rust keris, so it probably doesn't matter much. These days I use ordinary household vinegar for de-rusting, and next time I have some blades to do I intend to try citric acid. |
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#10 | |
Member
Join Date: Sep 2012
Location: Surabaya - Indonesia
Posts: 199
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I mean really dissolved without a trace but perhaps a thick yellowish smoke ... as that thing (aqua regia - or king of water) can literally eat away ceramic blocks, dissolve gold and platinum and must be handled with extreme care ... I myself using lime (jeruk nipis) and coconut water, and some soft steel wire brush |
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#11 |
Member
Join Date: Jun 2009
Posts: 1,232
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Regarding acid... this is one of my favorite threads:
http://www.vikingsword.com/vb/showth...ght=holy+smoke. It really begins with post #29, and from post #36 on for some posts it becomes otherworldly good. Enjoy! ![]() |
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#12 | |
Member
Join Date: Sep 2012
Location: Surabaya - Indonesia
Posts: 199
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I've seen junk cleaned and turned to be treasure, but this one ... just broke my heart to see it |
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#13 |
Member
Join Date: Sep 2012
Location: Surabaya - Indonesia
Posts: 199
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hi neo ...
where in Indonesia can you buy evapo rust ? I'd like to give it a shot - for my motorcycle spare parts, not keris :P |
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#14 |
Keris forum moderator
Join Date: Aug 2006
Location: Nova Scotia
Posts: 7,085
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You can buy it on line Donny, but i don't know about the shipping costs...
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#15 | |
Member
Join Date: Sep 2012
Location: Surabaya - Indonesia
Posts: 199
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#16 |
Vikingsword Staff
Join Date: Nov 2004
Posts: 6,284
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Coca Cola then ??
For the bike parts ..... ![]() |
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#17 | |
Member
Join Date: Sep 2012
Location: Surabaya - Indonesia
Posts: 199
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I have read that evapo rust is basically chelates compound, which bonds with Ferric compounds ... it operates in pH 6,2 - 7.1 (pretty safe), and safe to be dumped to sewer no need gloves / glasses / etc when using it, as it is safe it is formulated so that it is strong enough to bond with rust (Fe2O3) on the surface of the corroded parts, but not strong enough to pull Fe molecules out from the blade. Basically it converts and dissolving ONLY the rust and leave the other parts but that's the marketing talk ... I need proof ![]() that's why I wanted to try some |
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#18 |
Member
Join Date: Aug 2010
Posts: 180
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Interesting re the Golden Circle. Approx 2-3 years ago the stuff was great for rust removal and tasted really good (especially with sprite zero). Had problems with the kids getting into my stash. But the last couple of lots I bought, maybe a year ago, was thin and not the nicest, thought I'd got some from a bad batch. Think I've still got some around somewhere.
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#19 |
Member
Join Date: May 2006
Posts: 6,820
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Yeah, this is what happens when you are bound by law to try to produce the biggest possible profit for your shareholders. This takeover by foreign companies of Australian --- and I guess businesses in other countries --- usually seems to go in more or less the same way:- they take a good company with a good product and set out to totally destroy both the product and the company. Seems like insanity to me. But what would I know?
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#20 |
Member
Join Date: Dec 2009
Posts: 313
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Jean, I suppose that your Panjang keris is that of which you spoke to me last Thursday in Milano. Really a very nice piece, and my compliments for the restoration.
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#21 | |
Member
Join Date: Jun 2009
Posts: 1,740
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Thank you. This is my eldest panjang kris blade, I did not really restore it but just cleaned it in pure vinegar (8-10 % acetic acid) for about 24 hours with 2 intermediate scrubbings; there are some small pits left but they were present before cleaning. I attach the pics of another panjang blade before and after cleaning it in vinegar, with the same procedure and a very good result also. By the way and contrary to diluted mineral acids (hydrochoric, sulphuric, nitric, etc), vinegar is a too weak acid for attacking the bare metal in case anybody has doubts about it. ![]() Regards |
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#22 |
Keris forum moderator
Join Date: Aug 2006
Location: Nova Scotia
Posts: 7,085
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Nice job Jean. I might give vinegar a try next time i do a cleaning. I noted that Alan stated he has switched to vinegar since they stopped having good pineapple juice in Australia for the purpose.
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