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Analysis of Titanium and Steel Plate’s Corrosion of 38DD350 Type Ion-exchange Membrane Electrolyzer Cell

Author: LiShuSheng
Tutor: WangKuiSheng
School: Beijing University of Chemical Technology
Course: Mechanical Design and Theory
Keywords: Pitting corrosion Electrochemical Passivation film Galvanic corrosion
CLC: TG174
Type: Master's thesis
Year: 2009
Downloads: 24
Quote: 0
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Abstract


Titanium plate and steel Corrosion of 38DD350 electrolyzer , the paper , the flow field of the anode chamber was analyzed using Fluent software to identify the distribution of the flow field of corrosion . Use of electrochemical theoretical analysis of the titanium plate pitting and surface corrosion . The reason titanium pitting is caused due to the rise in voltage of the electrolyzer , and the titanium lattice defect in processing . Surface corrosion reason is because in the region of the damage of the ion-exchange membrane , so that the cathode compartment NaOH solution was directly caused by the contact with the titanium . Geometric model of the anode chamber , the anode chamber of the flow field were analyzed using Fluent software . Found that chlorine aggregation and flow stagnation phenomenon appeared in the location of the pitting and found chlorine in pitting product component analysis can explain to pitting generation and aggregation of chlorine . On the titanium upper right area of ??the flow field analysis found that slow flow of liquid in the region , which region is a region furthest from the brine inlet , resulting in the region of the NaCl concentration was decreased , resulting in damage to the ion-exchange membrane , resulting in a the surface of the titanium plate corrosion. The corrosion of the steel sheet , causing the anode brine tank into the junction of titanium and steel , constitute a galvanic corrosion pitting due to the titanium . The entrance of the anode chamber has been improved, improved flow field to improve the flow field of the titanium plate pitting and surface areas of corrosion . Have a positive effect on the generation to prevent pitting and surface corrosion .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection
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