前言 不锈钢的腐蚀常常是以局部腐蚀的形式出现为主,其中点蚀与缝隙腐蚀较普遍,尤其在Cl~-介质中,表现得更为突出。为此,国内外在近廿多年都不断研制新钢种,以提高其在Cl~-介质的耐蚀性能。这次考虑设计板式换热器的选材时,因为要大量接触Cl~-介质,经过 Preface The corrosion of stainless steel often appears mainly in the form of local corrosion, in which pitting and crevice corrosion are more common, especially in Cl ~ - media. To this end, both at home and abroad in the past 20 years have been developing new steel species, in order to improve its corrosion resistance Cl ~ - medium. This time considering the design of plate heat exchanger material selection, because a large number of contact with Cl ~ - media, through