MECHANISM OF THE CATHODIC PROTECTION BY SQUARE WAVE PULSED CURRENTSⅡ EFFECTS OF THE CURRENT PARAMETERS

J Chin Soc Corr Pro

2002, Vol. 22

Issue (6): 367-370 DOI:

Research Report

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MECHANISM OF THE CATHODIC PROTECTION BY SQUARE WAVE PULSED CURRENTSⅡ EFFECTS OF THE CURRENT PARAMETERS

Yubing Qiu;Zhihu Guo;Hantong Lin

华中科技大学

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Abstract Effects of the square wave pulsed current(SWPC) par ameters i.e. frequency (f),magnitude(IA) and duty cycle(P) on the cathodic polarization potentials(E) and polarization extents(ΔE) of the Q235 steel electrodes were studied in 3%NaCl,0.06%NaCl and tap water.The result s show that E and ΔE change negatively with the increase of IA, f and P,but if E is close or more negative than -1.00V(SCE),the change of E and ΔE will decrease largely.The effects of each current parame ters on ΔE are different and relate closely to E.The general principle and method to adjust the current parameters are indicated that on the basis of a chieving an expected protection status,the SWPCs with lower P and IA a re recommended,and if the current parameters need to be adjusted,firstly frequen cy is adjusted and then IA.

Key words: current square wave pulsed current cathodic protection mechanism

Received: 19 May 2001

ZTFLH:

TG174.41

Corresponding Authors: Yubing Qiu

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Yubing Qiu; Zhihu Guo; Hantong Lin. MECHANISM OF THE CATHODIC PROTECTION BY SQUARE WAVE PULSED CURRENTSⅡ EFFECTS OF THE CURRENT PARAMETERS. J Chin Soc Corr Pro, 2002, 22(6): 367-370 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2002/V22/I6/367

[1]QiuYubing,GuoZhihu,LinHantong.MechanismofthecathodicprotectionbysquarewavepulsedcurrentsⅠ:characteristicsofthecathodicpotentialwaveforms[J].J .ChineseSocietyforCorrosionandProtection,2002,22(5):295-299(邱于兵,郭稚弧,林汉同.方波脉冲电流阴极保护机理研究(Ⅰ)阴极电位波形特征[J].中国腐蚀与防护学报,2002,22(5):295-299)
[2]QiuYubing.Mechanismofthepulsedcurrentcathodicprotection[D ].Wuhan:HuazhongUniversityofScienceandTechnology,2001(邱于兵.脉冲电流阴极保护机理研究[D].武汉:华中科技大学,2001)
[3]QiuYubing,GuoZhihu,LinHantong.Pulsedcurrentcathodicpro tectiontechnology[J].Corros.Sci.Prote.Technol.,2001,13(4):226(邱于兵,郭稚弧,林汉同.脉冲电流阴极保护技术[J].腐蚀科学与防护技术,2001,13(4):226)

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