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| STUDY ON ANODIC PROTECTION IN STAINLESS STEELSPIRAL PLATE COOLER FOR CONCENTRATED SULFURIC ACID |
| Dunjia Xv;Jinshan Li;Jianguo Zheng |
| 兰州西固区合水北路3号化机院 |
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Abstract According to Ohm's law and Kirchhoff's current law, a differential equation,which related the potential gradient along the width of the spiral plate cooler to the current density at the surface of spiral plate,wa s deduced.By means of a spiral cathode,assuming the spiral plate was passivated, the equation for the potential distribution along the width of spiral was also f ounded.After measuring the specific resistance of concentrated sulphuric acid an d the passive current density of stainless steel in the acid,the potential drop can be calculated.The calculated result was verified by simulated experiments.An industrial cooler was designed according to the present study.After application in situ,it shows the satisfactory anti-corrosive capacity.
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Received: 12 October 2000
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Corresponding Authors:
Dunjia Xv
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