摘要
在 3%NaCl、0 0 6 %NaCl和自来水 3种实验介质中 ,研究了Q2 35钢的方波脉冲电流幅值 (IA)、频率 (f)和占空比 (P)的变化对于阴极极化电位 (E)和极化幅度 (ΔE)的影响规律 .结果表明 ,E和ΔE随方波IA、f和P的增加而变负 ,但当E接近或负于 - 1 0 0V(SCE)时 ,再增加各电流参数的值 ,E和ΔE的负移程度都大大减小 .各电流参数对ΔE的影响程度不同 ,并与E值密切相关 .提出调整电流参数总的原则和方法是 :在达到所要求的保护效果的前提下 ,尽可能采用低P、低IA 的电流参数 ,并优先调整 f ,再调整IA.
Effects of the square wave pulsed current(SWPC) parameters i.e. frequency (f),magnitude(I A) and duty cycle(P) on the cathodic polarization potentials(E) and polarization extents(ΔE) of the Q235 steel electrodes were studied in 3%NaCl,0.06%NaCl and tap water.The results show that E and ΔE 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 ΔE will decrease largely.The effects of each current parameters on ΔE are different and relate closely to E.The general principle and method to adjust the current parameters are indicated that on the basis of achieving an expected protection status,the SWPCs with lower P and I A are recommended,and if the current parameters need to be adjusted,firstly frequency is adjusted and then I A.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2002年第6期367-370,共4页
Journal of Chinese Society For Corrosion and Protection
关键词
电流参数
方波
脉冲电流
阴极保护
current,square wave,pulsed current,cathodic protection,mechanism
