Results after 4 hours - concrete etching CA CA_10.jpg CA_11.jpgįinished product after 5 hours and a quick wire brush by hand. Results after 4 hours - food CA CA_09.jpg Inserted in White Knight concrete etcher ( Citric Acid) CA_07.jpg The recently cut metal is attacked very aggressively with the food CA CA_06.jpg At this level of concentration, sure, citric acid can remove rust, but it is also harmful to the metal below the rust, (not to mention if it has paint on it) in addition to to your skin, nails, and other materials that come into contact with it. Test piece inserted in food CA CA_05.jpg CA_05 (2).jpg Test pieces cut from wire brushed section CA_04.jpg Original rusted iron bar, wire brushed on RHS CA_02.jpg The problem with Evapo-Rust is the cost - $25 per litre, or $75 for 5 litres, plus postage, but it is just as effective as the citric acid, but does not etch the clean bare metal, is non toxic and biodegradable - can be used as a hand wash too. It is made in Cairns and readily available online. I used the same strength for each powder, 100 gm per litre of water. White Knight advise that their concrete etching powder is pure anhydrous citric acid. Took just 5 hours, with a quick brush with a wire brush by hand every hour - amazing result too. I used two products to test, and both gave much the same result - cooking Citric Acid from the supermarket, $3 per 100 grams, and Concrete Etching from Bunnings - $2 per 100 gm. Description: CitriSurf 2310 is a high quality blend of chemicals formulated for cleaning, rust removal and passivation of stainless steel products. Hi FenceFurniture, thought you might be interested in my test results using two sources of citric acid on a very rusty bar for 5 hoursĪttached are some pics of some citric acid powder in water on rust. This is a follow on from FenceFurnitures original post here.
0 Comments
Leave a Reply. |