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Unformatted text preview: spontaneously passivates. Explain the following using appropriate polarization diagrams if necessary. [a] Your supplier offers you some muriatic acid containing 2% ferric chloride at a big discount because other consumers reject it on the basis of its deep orange color. If ferric salts are tolerable in your process, will this acid corrode your tank more rapidly than the regular muriatic acid? [b] An excess of pure hydrochloric acid with no detectable ferric salts becomes available from another part of the plant. Can you take this acid into your storage tank without any risk of increasing corrosion rate? 1.2 1x10-6 0.3 0.1 7x10-7-0.200 B 0.7 1x10-5 0.1 1x10-6-0.400 A E tr , V I pass , A E pp , V b A , V I corr , A E corr , V alloy...
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- Fall '09