1、4800 英文单词， 2.4 万英文字符 ， 中文 6700 字 文献出处： Gagliardi A, Lanzutti A, Simonato M, et al. Failure analysis of a plate heat exchanger used in a blast chillerJ. Engineering Failure Analysis, 2018, 92: 289-300. Failure analysis of a plate heat exchanger used in a blast chiller A. Gagliardi, A. Lanzutti, M. Si
2、monato, R. Furlanetto, M. Magnan, F.Andreatta, L. Fedrizzi Abstract A stainless steel plate heat exchanger (PHE) was received to investigate the cause of its perforation in service leading to mixing of the uids (water and refrigerant) circulating in the system. The heat exchanger was employed in a b
3、last chiller using seawater subjected to a reverse osmosis process followed by salinization and sanitizing treatments. This study includes the analysis of water samples in different points of the system, a metallurgical characterization of the material of the plates, a study of the composition of co
4、rrosion products and an evaluation of the electrochemical behaviour of the material in the water samples extracted from the system. The study revealed that the material of the plates was perforated by a corrosion process due to the high level of chlorides present in the water employed in the blast c
5、hiller. Moreover, the localized attack of the stainless steel plates is enhanced by the peculiar geometry of the heat exchanger that leads to crevice corrosion in the region of the joint between overlapping plates. The results obtained in this work indicate that the failure is associated to the wate
6、r treatment process performed upstream of the heat exchanger. Keywords: Heat-exchanger； Stainless steel； Localized corrosion； Chloride 1. Introduction The plate heat exchangers (PHE) are fundamentally composed of overlapping plates. These plates are usually corrugated in order to induce a non-laminar ux in the system. The uids passing through the PHE are separated by gaskets. In PHEs these uids pass in the interspace between the plates in an alternated manner. PHEs are normally used in se
