CPC F28F 21/085 (2013.01) [C22C 9/00 (2013.01); F28F 1/00 (2013.01); F28F 19/00 (2013.01)] | 18 Claims |
1. A method for suppressing ants' nest corrosion, comprising:
producing a heat transfer tube, wherein the heat transfer tube consists of copper, phosphorous, and inevitable impurities comprising at least one of Fe, Pb, and Sn, the inevitable impurities being contained in an amount of not higher than 0.05% by weight in total, and the producing of the heat transfer tube includes adding the phosphorous so as to be 0.19-1.0% by weight in total to suppress the ants' nest corrosion,
positioning the heat transfer tube in air-conditioning equipment and operating the air-conditioning equipment, whereby the heat transfer tube is exposed to a corrosive action caused by a corrosive medium comprising at least one lower carboxylic acid, in which said corrosive action progresses in the form of said ants' nest corrosion from an outer surface of the heat transfer tube in a direction of its wall thickness.
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