Noise Analysis of Corrosion Potential for Pt and Austenitic Stainless Steels in Dilute Sulfuric Acid Solution

Miya Kazuhiro, Tachibana Koji

doi:10.3323/jcorr1974.37.2_97

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Other Title

希硫酸中に浸漬したPt及びオーステナイト系ステンレス鋼の電位ノイズ解析
希硫酸中に浸漬したPt及びオーステナイト系ステンレス鋼の電位ノイズ解析--塩化物イオン添加前後のノイズパターンの変化
キリュウサンチュウニシンセキシタ Pt オヨビオーステナイトケイステン
塩化物イオン添加前後のノイズパターンの変化
Changes in Noise Pattern before and after Chloride Ions Addition

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Description

Electrochemical noise analysis, based on FFT analysis of random signals, was applied to corrosion potential of Pt, SUS 304 and SUS 316 in 0.05mM H₂SO₄ before and after 1M Cl^- addition. The noise data obtained were represented as the three dimensional noise spectra (noise intensity, time, frequency), using a personal computer. At the same time, the generation probability of the noise for each frequency was given as histogram, in a given period of the immersion.<br>It was found that the noise intensity on Pt markedly decreased with the addition of Cl^-, being kept constant in the following long period. For austenitic stainless steels, it was recognized for the noise intensity in lower frequency side to increase gradually after Cl^- addition, along with some increasing tendency in the frequency of the noise generation events. It was also shown that the generation probability of noise on Pt was depressed to lower level essentially in all frequency range, while probability maximum appearing around 0.2Hz for austenitic stainless steels.

Journal

CORROSION ENGINEERING

CORROSION ENGINEERING 37 (2), 97-101, 1988

Japan Society of Corrosion Engineering

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