常用(yong)(yong)的極化探頭在(zai)埋地鋼質(zhi)管道陰極保護中的應(ying)用(yong)(yong)

  焦作弘坤防腐陰極保護公司，位于(yu)河南省焦作市，*的(de)陰極保護廠(chang)家，常用(yong)的(de)極化探頭在埋地(di)鋼質管道(dao)陰極保護中(zhong)的(de)應用(yong)。

   今天為大家(jia)分析管(guan)道(dao)陰極(ji)(ji)(ji)(ji)保(bao)護電位(wei)測(ce)量(liang)誤差(cha)的(de)(de)原(yuan)因，論述(shu)極(ji)(ji)(ji)(ji)化(hua)探(tan)頭的(de)(de)結構和使用(yong)方法等知識。歡迎大家(jia)查閱。參(can)比電極(ji)(ji)(ji)(ji)的(de)(de)極(ji)(ji)(ji)(ji)化(hua)探(tan)頭在埋地天然氣鋼質管(guan)道(dao)陰極(ji)(ji)(ji)(ji)保(bao)護參(can)數測(ce)量(liang)中(zhong)的(de)(de)實際效(xiao)果。通(tong)過測(ce)量(liang)結果與其他方法的(de)(de)測(ce)量(liang)結果相比，在管(guan)道(dao)陰極(ji)(ji)(ji)(ji)保(bao)護正常運行(xing)狀態下，用(yong)極(ji)(ji)(ji)(ji)化(hua)探(tan)頭法可(ke)以使電位(wei)測(ce)量(liang)誤差(cha)小(xiao)，可(ke)以測(ce)到(dao)接近真實值的(de)(de)管(guan)道(dao)陰極(ji)(ji)(ji)(ji)保(bao)護電位(wei)。

   在(zai)管(guan)(guan)道保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)位(wei)(wei)的(de)(de)測(ce)量(liang)(liang)中(zhong)，存在(zai)誤差(cha)(cha)的(de)(de)原因，在(zai)此為(wei)(wei)(wei)大家講解(jie)。在(zai)運行(xing)餓(e)陰極(ji)保護(hu)(hu)系統中(zhong)，將參比電(dian)(dian)(dian)(dian)(dian)極(ji)置于管(guan)(guan)道附近土(tu)壤(rang)中(zhong)測(ce)量(liang)(liang)管(guan)(guan)道和參比電(dian)(dian)(dian)(dian)(dian)極(ji)之間的(de)(de)電(dian)(dian)(dian)(dian)(dian)位(wei)(wei)差(cha)(cha)，得到通電(dian)(dian)(dian)(dian)(dian)狀(zhuang)態下的(de)(de)保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)位(wei)(wei)，稱為(wei)(wei)(wei)通電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)位(wei)(wei)。根據參比電(dian)(dian)(dian)(dian)(dian)極(ji)與管(guan)(guan)道的(de)(de)距離不同，其測(ce)量(liang)(liang)又分(fen)為(wei)(wei)(wei)地表參比、近參比等不同方法。一般情(qing)況(kuang)下，采用斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)法即切斷(duan)(duan)陰極(ji)保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)后測(ce)量(liang)(liang)，可消除(chu)部分(fen)誤差(cha)(cha)。但在(zai)某些(xie)(xie)情(qing)況(kuang)下，這些(xie)(xie)誤差(cha)(cha)就是R將造(zao)(zao)成(cheng)的(de)(de)。不能用斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)法消除(chu)的(de)(de)誤差(cha)(cha)是各種(zhong)(zhong)雜散電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)、二次電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)造(zao)(zao)成(cheng)的(de)(de)地電(dian)(dian)(dian)(dian)(dian)位(wei)(wei)梯度(du)引起的(de)(de)，是非(fei)陰極(ji)保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)造(zao)(zao)成(cheng)的(de)(de)歐姆壓降(jiang)(jiang)，稱為(wei)(wei)(wei)非(fei)歐姆壓降(jiang)(jiang)。雜散電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)是在(zai)非(fei)指(zhi)定(ding)回(hui)路中(zhong)流(liu)(liu)動(dong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。二次電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)是因為(wei)(wei)(wei)被保護(hu)(hu)金屬極(ji)化(hua)程度(du)不同造(zao)(zao)成(cheng)的(de)(de)在(zai)極(ji)化(hua)差(cha)(cha)異部位(wei)(wei)之間流(liu)(liu)動(dong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。這兩種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)都不會因保護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)斷(duan)(duan)而(er)立即消失。除(chu)了介質電(dian)(dian)(dian)(dian)(dian)阻、涂層電(dian)(dian)(dian)(dian)(dian)阻外(wai)，某些(xie)(xie)非(fei)歐姆因素也可能造(zao)(zao)成(cheng)電(dian)(dian)(dian)(dian)(dian)位(wei)(wei)測(ce)量(liang)(liang)誤差(cha)(cha)。在(zai)工(gong)程施工(gong)中(zhong)，近年來推出管(guan)(guan)道瞬間斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)法、試(shi)片(pian)斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)法、極(ji)化(hua)探(tan)頭法等消除(chu)R降(jiang)(jiang)的(de)(de)測(ce)量(liang)(liang)技(ji)術。