判斷陰極保護是欠保護還是過保護,判斷指標是管道的斷電電位,不能以通電電位來判斷,因為通電電位中含有IR降。陰極保護電源(如恒電位儀)顯示的是通電電位,只要斷電電位不**標,通電電位多大都沒關系。盡管實驗室的實驗證明了氫致開裂現象,但工程實踐中幾乎沒有發(fā)現氫致開裂的案例。因此,對于氫致開裂沒必要過度擔心,尤其是X80以下的鋼制管道,不需要考慮氫致開裂問題。 工程上常見的3LPE防腐層剝離現象,是由于工廠涂覆時質量沒有控制好造成的,與陰極保護沒有關系。防腐層陰極剝離的前提是水的存在,而剝離的涂層下面沒有水,由于防腐層并沒有屬破損,陰極保護電流也無法到材達,所以不可能有氫氧根離子生成而導致環(huán)境堿性化。 To judge whether the cathodic protection is under protection or over protection, the judgment index is the power-off potential of the pipeline, which cannot be judged by the power-on potential, because the power-on potential contains IR drop. The cathodic protection power supply (such as potentiostat) shows the energizing potential. As long as the power-off potential does not exceed the standard, it does not matter how much the energizing potential is. Although laboratory experiments have proved the phenomenon of hydrogen induced cracking, there are few cases of hydrogen induced cracking in engineering practice. Therefore, there is no need to worry too much about hydrogen induced cracking, especially for steel pipes below X80. The common peeling phenomenon of 3LPE anticorrosive coating in engineering is caused by poor quality control during coating in the factory, which has nothing to do with cathodic protection. The premise of cathodic stripping of anti-corrosion coating is the existence of water, and there is no water under the stripped coating. Since the anti-corrosion coating is not damaged and the cathodic protection current cannot reach the material, it is impossible to generate hydroxyl ions and cause environmental alkalization.
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詞條說明
存在雜散電流時的管地電位測量1、電壓表測量的電位是地電位梯度與較化電位的和? ?當地表中有電流流動時,如受地鐵雜散電流或高壓直流輸電線路接地較放電干擾時,由于地表中有大電流流動,幾十到上百伏的管地電位讀數中大部分是地表中的電位梯度?v,而真正施加到管道防腐層漏點上的電壓沒有這么高,流入管道防腐層破損點的電流I2以及其產生的電壓E2未必就很大,電壓表讀數是?v?+ IR
高硅鑄鐵陽極性能以及結構性能:高硅鑄鐵陽極具有良好的導電性能,高硅鑄鐵陽極的允許電流密度為5~80A/㎡,消耗率小于0.5kg/(A.a)。用途:除用于焦炭地床重以外,高硅鑄鐵陽極有時也可以直接埋在低電阻率土壤中。化學成分:高硅鑄鐵陽極的化學成分應符合規(guī)定。結構:陽極引出線與陽極的連接位置應在陽極中部,其接觸電阻應小于0.01歐,拉脫力數值應大于陽極自身質量的1.5倍,接頭密封可靠。陽極引線長度不
智能測試樁簡介智能測試樁由標志樁、樁座和保護電位檢測儀組成,其特征在于標志樁設為圓柱形或矩形,其底部周長大于上部周長,樁座為圓形或矩形,樁座內設有保護電位監(jiān)測儀,在樁座周側設有保護電位監(jiān)測儀的兩個接線柱,其中一個接監(jiān)測探頭,另一個接被監(jiān)測管線上的監(jiān)測點,標志樁中心設有接收**較,并稍露出標志樁**部,其較與保護電位監(jiān)測儀內的GPRS通訊模塊電路相接,在保護電位監(jiān)測儀上設有GPRS通訊模塊的接口,直接
1.首先將鋅陽極帶散卷,將陽極帶在地面捋直,散卷時,如果周圍環(huán)境溫度太低,應避免突然彎曲和過度彎曲,要慢慢散卷,以免鋅陽極帶折斷。根據設計要求截成規(guī)定長度。22.檢查鋅陽極帶表面是否有油污、用抹布或砂紙清除掉雜物。33.用鋼鋸以及手鉗等工具,將鋅帶兩端的鐵芯剝出20毫米,將鐵芯用砂紙打光,套上收縮管。44.將電纜銅芯剝出20毫米,用銅管套住鐵芯以及電纜銅芯,用液壓鉛壓實。用萬用表檢查連接處的導通性
公司名: 焦作市虹泰防腐材料有限公司
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¥260.00
¥380.00
預包裝高硅鑄鐵陽極 淺埋式陽極地床 外加電流 陰極保護深井陽極
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