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題 名 | 敏化304不銹鋼在高溫純水環境中應力腐蝕電化學雜訊反應=Electrochemical Noise Behavior of 304 Stainless Steel during Stress Corrosion Cracking in High Temperature Pure Water |
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作 者 | 馮克林; 陳耀明; 朱方; 黃佳伸; | 書刊名 | 台電工程月刊 |
卷 期 | 604 1998.12[民87.12] |
頁 次 | 頁18-30 |
分類號 | 449.2 |
關鍵詞 | 電化學雜訊; 應力腐蝕破裂; 304不銹鋼; Electrochemical noise; Stress corrosion cracking; 304 stainless steel; |
語 文 | 中文(Chinese) |
中文摘要 | 加氫水化學是目前抑制沸水式反應器(BWR)系統不�袗�組件 沿晶應力腐蝕破裂主要方法,可從自然腐蝕電位間接反應出加氫效 果,但最直接評估不同位置加氫水化學抑制應力腐蝕破裂的功效,則 需實際監測個別組件位置及相關環境下,不�袗�試片應力腐蝕破裂的 起始和成長傾向。本研究是針對304不�袗�在高溫純水環境中,以 靜態固定位移施力方法之C型或U型試片測試所引發之應力腐蝕破 裂電化學偶合電流或自然腐蝕電位訊號進行評估,不論是以整體電流 或電位走勢、局部脈衝頻率及強度、標準偏差值、或能量頻譜密度等 分析指標仍無法明確辨別出應力腐蝕破裂狀態。在高阻抗之純水環境 中,電化學雜訊用來偵測應力腐蝕破裂局部腐蝕現象敏感度仍需進一 步改善。 |
英文摘要 | Hydrogen water chemistry (HWC) is one of the most important methods for mitigating and preventing stress corrosion cracking (SCC) problems of stainless steel components in boiling water reactor (BWR) pressure vessel systems. Even though the effectiveness of HWC can be indirectly reflected by electrochemical potentials, the most direct measuring technique is to monitor SCC susceptibility of individual component's at critical locations. This study will evaluate the SCC electrochemical noise signals of 304 stainless steels in simulated BWR environment with constant-displacement loaded C ring and notched U-bend specimens. From the coupling current and corrosion potential behaviors during immersion test, it is difficult to interpret the general state of stress corrosion cracking based on the analytical results of overall current and potential variations. local pulse patterns, statistical characteristics, or power spectral density of electrochemical noise signals. For aqueous environments of high solution impedance, successful application of electrochemical noise technique for SCC monitoring may yet require further improvement. |
本系統中英文摘要資訊取自各篇刊載內容。