Patent ID: 6200632
Filing Date: 2001-03-13
Classification: H05K

Abstract:
A method for applying a fluoropolymer coating to the internal surfaces of a heat exchanger that includes a hollow interior, a fluid inlet, and a fluid outlet, comprising the steps:a. directing a flushing solution into the heat exchanger inlet, through the hollow interior of the heat exchanger and out of the heat exchanger outlet to give a cleaned heat exchanger;b. removing the flushing solution from the cleaned hollow heat exchanger;c. introducing air into the cleaned hollow heat exchanger to give an essentially dry cleaned hollow heat exchanger;d. introducing a fluoropolymer solution into the essentially dry cleaned hollow heat exchanger and circulating the fluoropolymer solution through the cleaned hollow heat exchanger for a period of time sufficient to give a fluoropolymer coated heat exchanger;e. removing the fluoropolymer solution from the fluoropolymer coated heat exchanger; andf. introducing air into the fluoropolymer coated heat exchanger for a period of time sufficient to give a fluoropolymer film coated heat exchanger.