What are the reasons for severe anode and cathode corrosion in naturally polarized ion membrane electrolyzers produced by Beihua Machinery?

Two and a half years? That can’t be right, right? There’s no problem with the quality of the battery cell; it’s an issue with the operation!

Be more specific in the description: Which company’s membrane is being used? How is the quality of the saltwater? Are the control parameters normal?

It’s not clear enough. However, corrosion in electrolyzers occurs at the anode; it seems that there is no proper control in place!

Be more specific so it can be analyzed. Last edited by yzhms on 2009-3-1 00:41 in this post.]

Please, the original poster, explain the following points: 1. What was the situation after making slots for inspection after parking the vehicle? 2. What was the color of the anode inlet pipe on the day following cleaning the tank after parking? 3. Most importantly, what were the pH value and acidity level of the brine coming out of the tank without any acid added? 4. What are the levels of sodium chloride and chlorate in your finished alkaline product? Anode corrosion is mainly caused by alkalis; alkalis undergo chemical reactions with titanium as well as electrochemical reactions (professional comment). :handshake (How come no one gave points for such a classic answer!? :L ) This post was last edited by 181128425 on 2008-8-23 09:15

Has the effect of powering down the battery cell been checked? Especially the saltwater system? Is the corrosion site on the electrolyzer in the same place? How is the corroded surface?

Widespread corrosion of the anode and cathode in the electrolyzer within a short period of time is most likely caused by a membrane leak. If you need help identifying the specific issues, feel free to contact me by email at ningyansf@126.com

Is this type of groove non-polarized? It’s a question of polarization; it seems that other factors cannot affect both poles at the same time. Check the electric density to see if it’s too high – is it the same throughout or only in certain areas? In some cases, it might be due to membrane leakage

I heard that the anode affects the voltage, while the cathode affects current efficiency. There is a plateau in ion membrane current: current efficiency decreases at low currents below 1000 A and at high currents above 5000 A； And the current efficiency remains relatively constant between 1000 and 5000A; of course, different membranes have varying effects. Last edited by hydhq1978 on 2009-2-27 at 11:05.]

My suggestion is to call directly and ask Director Liu Xiuming from Beihua Machinery, who is in charge of training on ion membrane technology. He has written a very good summary article titled: \"Starting, Stopping Methods and Key Operating Points for the NBH-2.7 Type Polarized Natural Circulation High Current Density Ion Membrane Electrolyzer\", by Liu Xiuming from Lanxing (Beijing) Chemical Machinery Co., Ltd. (Address: No. 5 Xingye Street, Beijing Economic and Technological Development Area, Postal Code 100176). Abstract； This article aims to explain the startup and shutdown methods as well as the key operating points of the new ion-exchange membrane electrolysis unit. I discussed this in the tenth issue of this journal in 2006, and after nearly a period of practice, I feel it is necessary to conduct a more thorough systematic discussion in conjunction with the start-up and shutdown procedures. This article argues that aspects such as preparation for driving, the coordination conditions of various systems during starting and stopping, as well as control methods and techniques, form the foundation and an important guarantee for the safety of personnel and equipment, as well as for the high-level and stable operation of the installation. Keywords ； DCS control system, nitrogen, purging, chlorine, hydrogen, pressure, pressure difference, flow rate, temperature, concentration, manual control, automatic control, cascade control, regulator opening degree. Study his papers carefully – they will be of great help for your operations and control, as you are using their tanks. Last edited by hydhq1978 on 2009-2-27 11:12