表面技术
錶麵技術
표면기술
SURFACE TECHNOLOGY
2015年
1期
136-140
,共5页
偶合电极%保护电位%偶合电流%牺牲阳极
偶閤電極%保護電位%偶閤電流%犧牲暘極
우합전겁%보호전위%우합전류%희생양겁
coupling electrode%protection potential%coupling current%sacrificial anode
目的：研究油温对海底输油管道阴极保护的影响。方法通过模拟海水实验，参照 GB/T 17848—1999实验方法，分析铁电极、铝电极和偶合电极在不同油温下的腐蚀电位和偶合电流的变化规律，测试25°和75°海水中牺牲阳极的工作电位，并计算阳极的电流效率，观察阳极的腐蚀形貌。结果在25~75°范围内，铝电极随着温度升高自腐蚀电位负正移，铁电极随着温度升高自腐蚀电位负移。偶合电位正移，偶合电流显著增大。结论与25°相比，牺牲阳极在75°海水中，保护电位下降，阴极保护效果降低。
目的：研究油溫對海底輸油管道陰極保護的影響。方法通過模擬海水實驗，參照 GB/T 17848—1999實驗方法，分析鐵電極、鋁電極和偶閤電極在不同油溫下的腐蝕電位和偶閤電流的變化規律，測試25°和75°海水中犧牲暘極的工作電位，併計算暘極的電流效率，觀察暘極的腐蝕形貌。結果在25~75°範圍內，鋁電極隨著溫度升高自腐蝕電位負正移，鐵電極隨著溫度升高自腐蝕電位負移。偶閤電位正移，偶閤電流顯著增大。結論與25°相比，犧牲暘極在75°海水中，保護電位下降，陰極保護效果降低。
목적：연구유온대해저수유관도음겁보호적영향。방법통과모의해수실험，삼조 GB/T 17848—1999실험방법，분석철전겁、려전겁화우합전겁재불동유온하적부식전위화우합전류적변화규률，측시25°화75°해수중희생양겁적공작전위，병계산양겁적전류효솔，관찰양겁적부식형모。결과재25~75°범위내，려전겁수착온도승고자부식전위부정이，철전겁수착온도승고자부식전위부이。우합전위정이，우합전류현저증대。결론여25°상비，희생양겁재75°해수중，보호전위하강，음겁보호효과강저。
ABSTRACT:Objective To study the effects of the oil temperature on cathodic protection devices of submarine oil pipeline. Methods Referring to the testing standard GB/T 17848—1999, the changing rules of corrosion potential and coupled current of the iron electrode, aluminum electrode and coupling electrode at different oil temperatures were analyzed through simulated seawater experiment. The working potentials of sacrificial anode at 25 ° and 75 ° were tested, and the current efficiency of anode was cal-culated. The corrosion morphology of anode was observed. Results In the range of 25 ° to 75 ° , the corrosion potential of alumi-num electrode increased, the corrosion potential of iron electrode decreased, the coupled potential shifted to positive value and the coupled current significantly increased with increasing temperature. Conclusion The protection potential and protection current effi-ciency of sacrificial anode decreased in 75 ° seawater when compared to those at 25 ° .
