流动淡水对钢材阴极保护参数影响.pdfVIP

2 No. 2 2002 6 HYDROSCIE CE A D E GI EERI G Jun. 2002 朱锡昶, 葛 燕, 朱雅仙, 朱秀娟 ( , 210029) : , 3 . , , , ; . : ; ; ; ; ; : TV131. 3 T G174. 41 : A : 1009- 640X( 2002) 02- 0021- 05 Effects of flowing fresh water on cathodic protection paramenters of steel ZHU Xich ng, GE Y n, ZHU Y x i n, ZHU Xiuju n ( N anj ing H ydraul ic Resear ch I nsti tute, N anj ing 2 10029, Chi na) Abstract: V ri tion of n tur l potenti ls, c thodic pol riz tion curves nd v ri tion of st ble current density w ith time for c rbon steels in flow ing fresh w ter w ith different velocities nd in three different surf ce st tes re tested. Results show th t it is difficult to m ke c thodic protection on b re steel bec use of l rge current density, nd th t c thodic protection is suit ble for co ted steel. Key words: corrosion; n tur l potenti l; current density ; c thodic protection; velocity of w ter; steel , ( ) , . , , . , . , , . : 2002- 01- 25 : ( SPKJ007- 04) : ( 1957- ) , , , , . 22 2002 6 1 试验 概况 [ 1] . . , , 8 . , ( ) + 3 . , ; / , , . 2 800~ 3 000 cm, 0~ 6. 2 m/ s. . 2 不同流速对钢自然电位的影响 8 h , 5 h 30 h , , , 5 h ( 1) . 1 Fig . 1 N tur l potenti ls of t he steel s mples t different velocities , , - 770 mV( / , ) . , , 1. 2~ 6. 2 m/ s, - 426~ - 322 mV, 344~ 448 mV, 0~ 1. 2 m/ s, , 1. 2~ 6. 2 m/ s, . , , - 563 mV. 1. 2~ 6. 2 m/ s, - 605~ - 655 mV, , , 2. 8 m/ s 4. 5 m/ s , , 6. 2m/ s, .