常用的(de)極化探頭在埋地鋼質管道陰極保護中的(de)應(ying)用

  焦作弘坤防腐陰(yin)極保護公司，位(wei)于河南省焦作市(shi)，*的陰(yin)極保護廠家，常用的極化探頭在埋地(di)鋼質管道陰(yin)極保護中的應用。

   今天為大家分析管(guan)道陰(yin)(yin)極(ji)保護電位(wei)測量誤差的(de)(de)原因，論述極(ji)化(hua)探(tan)頭的(de)(de)結(jie)(jie)構和使(shi)用(yong)方(fang)(fang)法等知識。歡迎(ying)大家查(cha)閱。參(can)比(bi)電極(ji)的(de)(de)極(ji)化(hua)探(tan)頭在(zai)埋地天然氣鋼質管(guan)道陰(yin)(yin)極(ji)保護參(can)數測量中(zhong)的(de)(de)實(shi)際效果(guo)。通過測量結(jie)(jie)果(guo)與(yu)其他方(fang)(fang)法的(de)(de)測量結(jie)(jie)果(guo)相比(bi)，在(zai)管(guan)道陰(yin)(yin)極(ji)保護正(zheng)常運行狀態下(xia)，用(yong)極(ji)化(hua)探(tan)頭法可(ke)以使(shi)電位(wei)測量誤差小，可(ke)以測到接近(jin)真實(shi)值的(de)(de)管(guan)道陰(yin)(yin)極(ji)保護電位(wei)。

   在(zai)(zai)(zai)(zai)管道(dao)保護(hu)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)的(de)(de)測(ce)(ce)(ce)量(liang)中(zhong)(zhong)，存在(zai)(zai)(zai)(zai)誤(wu)差(cha)(cha)的(de)(de)原因(yin)，在(zai)(zai)(zai)(zai)此為(wei)(wei)大家講解。在(zai)(zai)(zai)(zai)運行餓陰極保護(hu)系統中(zhong)(zhong)，將(jiang)(jiang)參(can)比(bi)電(dian)(dian)(dian)(dian)(dian)(dian)極置于管道(dao)附近土壤中(zhong)(zhong)測(ce)(ce)(ce)量(liang)管道(dao)和(he)參(can)比(bi)電(dian)(dian)(dian)(dian)(dian)(dian)極之間的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)差(cha)(cha)，得到通電(dian)(dian)(dian)(dian)(dian)(dian)狀態下(xia)(xia)的(de)(de)保護(hu)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)，稱為(wei)(wei)通電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)。根據參(can)比(bi)電(dian)(dian)(dian)(dian)(dian)(dian)極與管道(dao)的(de)(de)距離不(bu)(bu)同，其(qi)測(ce)(ce)(ce)量(liang)又分(fen)(fen)為(wei)(wei)地表(biao)參(can)比(bi)、近參(can)比(bi)等(deng)(deng)不(bu)(bu)同方法(fa)。一般(ban)情(qing)況下(xia)(xia)，采用(yong)斷(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)法(fa)即切斷(duan)(duan)(duan)陰極保護(hu)電(dian)(dian)(dian)(dian)(dian)(dian)流后測(ce)(ce)(ce)量(liang)，可(ke)(ke)消除部分(fen)(fen)誤(wu)差(cha)(cha)。但在(zai)(zai)(zai)(zai)某些(xie)(xie)情(qing)況下(xia)(xia)，這些(xie)(xie)誤(wu)差(cha)(cha)就是(shi)R將(jiang)(jiang)造(zao)(zao)成(cheng)(cheng)的(de)(de)。不(bu)(bu)能用(yong)斷(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)法(fa)消除的(de)(de)誤(wu)差(cha)(cha)是(shi)各種雜散電(dian)(dian)(dian)(dian)(dian)(dian)流、二次(ci)電(dian)(dian)(dian)(dian)(dian)(dian)流造(zao)(zao)成(cheng)(cheng)的(de)(de)地電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)梯度(du)引起(qi)的(de)(de)，是(shi)非陰極保護(hu)電(dian)(dian)(dian)(dian)(dian)(dian)流造(zao)(zao)成(cheng)(cheng)的(de)(de)歐(ou)姆(mu)壓降(jiang)，稱為(wei)(wei)非歐(ou)姆(mu)壓降(jiang)。雜散電(dian)(dian)(dian)(dian)(dian)(dian)流是(shi)在(zai)(zai)(zai)(zai)非指(zhi)定(ding)回(hui)路中(zhong)(zhong)流動(dong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流。二次(ci)電(dian)(dian)(dian)(dian)(dian)(dian)流是(shi)因(yin)為(wei)(wei)被(bei)保護(hu)金(jin)屬(shu)極化(hua)程度(du)不(bu)(bu)同造(zao)(zao)成(cheng)(cheng)的(de)(de)在(zai)(zai)(zai)(zai)極化(hua)差(cha)(cha)異部位(wei)之間流動(dong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流。這兩種電(dian)(dian)(dian)(dian)(dian)(dian)流都不(bu)(bu)會因(yin)保護(hu)電(dian)(dian)(dian)(dian)(dian)(dian)流中(zhong)(zhong)斷(duan)(duan)(duan)而立即消失。除了介(jie)質電(dian)(dian)(dian)(dian)(dian)(dian)阻、涂層電(dian)(dian)(dian)(dian)(dian)(dian)阻外(wai)，某些(xie)(xie)非歐(ou)姆(mu)因(yin)素也可(ke)(ke)能造(zao)(zao)成(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)位(wei)測(ce)(ce)(ce)量(liang)誤(wu)差(cha)(cha)。在(zai)(zai)(zai)(zai)工(gong)程施工(gong)中(zhong)(zhong)，近年來推出管道(dao)瞬間斷(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)法(fa)、試片(pian)斷(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)法(fa)、極化(hua)探頭法(fa)等(deng)(deng)消除R降(jiang)的(de)(de)測(ce)(ce)(ce)量(liang)技術。