Re: Air Conditioning and engine temperature?

Posted by Owen_Dyneto on 2010/2/1 9:45:49

The first powder was oxalic acid which has the somewhat unique ability to "chelate or sequester" (solubilize) iron and it's oxides (rust). Google "chelation" for more insight. It's not a particularly strong acid but precautions like rubber gloves and safety glasses are recommended. It's not particularly aggressive against tin and lead (solder) and other materials of construction within the cooling system and thus should be safe to use except in cases where rust is the only thing holding things together. The second powder is sodium carbonate or bicarbonate to neutralize residual oxalic acid. It's certainly among the most effective radiator cleaners, far more effective than the single salt (trisodium phosphate) types.