30Cr2MoV汽轮机转子钢的PPT行为研究  

An Experimental Study on PPT Behaviors of 30Cr2MoV Steel

作　　者：张胜寒[1] 范丽美[1] 

机构地区：[1]华北电力大学环境科学与工程学院,保定071000

出　　处：《汽轮机技术》2009年第3期233-235,共3页Turbine Technology

摘　　要：采用恒电位脉冲测试技术,以钼酸钠作电解质溶液,通过正交试验法研究了在25℃时电解液pH值、钼酸钠浓度、脉冲时间比例、预极化电位对30Cr2MoV转子钢PPT行为的影响。研究发现:4个因素对电流密度影响的主次顺序为:电解液pH值、脉冲时间比例、钼酸钠浓度、预极化电位,并确定了PPT法研究汽轮机转子钢的老化较好的最佳试验条件为pH值为3.4,脉冲时间比例为1:2,电解液浓度为0.1mol/L,预极化电位为350mV,为进一步研究奠定了基础。并在PPT测量中,从总电流中扣除双电层充电电流,可提高再活化电流的精确度。In the solutions of sodium molybdate, the effects of pH value, sodium molybdate concentration, pulse time scale, pre-polarization potential on Potentiostatic Pulse Test（PPT） behaviors of 30Cr2MoV turbine rotor steel was investigated by using the orthogonal test. The significance of the effect of these four factors on the PPT behavior of 30Cr2MoV turbine rotor steel ordered from large to small as following： pH value, sodium molybdate concentration, pulse time scale , pre-polarization potential. The optimal test condition for studying the aging of turbine rotor steel by PPT method is 3.4 of pH value , 1：2 of pulse time scale,0.1 mol/L of sodium molybdate concentration, and 350mV of pre-polarization potential. Double-layered charging current deducts from the overall current in the PPT test, so can enhance the precision of reactivation current.

关 键 词：恒电位脉冲测试技术 转子钢 钼酸钠 

分 类 号：TK263.61[动力工程及工程热物理—动力机械及工程]