スマートプロセス学会誌
Online ISSN : 2187-1337
Print ISSN : 2186-702X
ISSN-L : 2186-702X
ステンレス鋼製熱交換器用Ni ろうの腐食挙動
深井 祐佑荘司 郁夫小林 竜也安藤 哲也吉田 拓也柏瀬 毅大友 昇
著者情報
ジャーナル フリー

2020 年 9 巻 3 号 p. 127-132

詳細
抄録

To investigate the corrosion behavior of the stainless steel joints brazed with nickel-based brazing filler metals in the heat exchanger, electrochemical measurement of SUS316L and filler metals were carried out. BNi-5 (Ni-Cr-Si alloy) and FP-613 (Ni-Cr- P-Si alloy) filler metals were prepared as nickel-based brazing filler metals. Corrosion potential, galvanic current and polarization curves of SUS316L, BNi-5 and FP-613 were measured in a 0.06 mol/L NaCl solution at 25℃ and 80℃. After the measurement, the microstructures of specimens were observed with an electron probe X-ray micro analyzer (EPMA). As a result, it was found that BNi-5 preferentially dissolves in the SUS316L joint with BNi-5 filler, and SUS316L preferentially dissolves in the joint with FP-613 filler in the NaCl solution. The EPMA analysis clarified that Si-rich Ni-Si-Cr-Fe phases and the Cr and P-rich phases preferentially dissolve in BNi-5 and FP-613, respectively.

著者関連情報
© 2020 一般社団法人 スマートプロセス学会
前の記事 次の記事
feedback
Top