Development mechanism of internal local corrosion of X80 pipeline steel
Zhuowei Tana, Liuyang Yangb, Dalei Zhangb,*(), Zhenbo Wanga,*(), Frank Chengc, Mingyang Zhangd, Youhai Jina

.

Fig. 2.. Schematic diagram of the experimental system: 1) gas-pressure meter, 2) gas master valve, 3) gas storage tank, 4) gas flowmeter, 5) gas flow regulating valve, 6) cooling pipe outlet, 7) cooling pipe inlet, 8) solution tank, 9) corrosion resisting centrifugal pump,10) flow master valve, 11) electrochemical workstation, 12) data acquisition computer, 13) fluid buffer box, 14) test channel, 15) testing electrode, 16) fluid distribution box, 17) vertical rotor flow meter, 18) flow control valve, and 19) return valve.