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Experience on preparation of zinc dipping solution

First of all, the zinc liquid can be concentrated or lightened. That is, the ratio of zinc oxide to alkali is generally 1: 5 or 6, if 20g of zinc base is 120g, 50g of zinc base is 300g. Potassium sodium tartrate acts as a complexing agent, Sodium nitrate or sodium nitrite is an activating oxidant. Sodium nitrite is better, Adding iron ions can improve corrosion resistance. Adding nickel ions can improve adhesion and surface compactness. Also can introduce copper ions and so on, in order to make nickel can be fully precipitated so the formula with nickel chloride to add cyanide, some people suggest that zinc oxide can not dissolve that is ridiculous! Because you don't know some basic knowledge of chemistry. Whoever wants to learn from my post will announce some formula and preparation methods in the next article!

Ladies and gentlemen: The problem of zinc dipping mentioned in the previous paragraph has been engaged in magnesium alloying plating experiment and production technical scheme due to intense work, and the computer is broken and there is no timely reply. Now reply, because some comrades are still discussing the problem of zinc dipping solution, because some of them may have just entered the industry, which is actually an open thing and does not need to be commercialized. There are two main points: one is the formula and the other is the preparation method. Zinc oxide is insoluble in water, including hot water, It only dissolves in high concentration lye, Please pay attention to my three words of high concentration. Some comrades say that it is theoretically good to pour zinc into lye after dissolving alkali, but ignore two important questions. It is difficult to pour out zinc with high viscosity. If you don't believe me, try it. Why do some alkali and zinc still have white precipitation after being integrated? This has nothing to do with the temperature, because the temperature is high after alkali dissolution, so I tell you that the reason for white precipitation is that you put too much water when dissolving alkali, and it will naturally be unclean if it exceeds the concentration of dissolved zinc. Below I write a recipe and describe the preparation procedure. It is to buy me a drink. Ternary alloy ratio: zinc oxide 8 grams sodium hydroxide 125 grams nickel chloride 8 grams potassium sodium tartrate 50 grams ferric chloride 1.5 grams sodium nitrite 1 grams sodium cyanide 5 grams. Preparation method: Put dry alkali and dry zinc together and then slowly add water and stir, water must not add more! After dissolving translucent, add sodium cyanide and stir to dissolve. Stir until it is transparent, then the water amount should be below 400mL, then put potassium sodium tartrate and ferric chloride and nickel chloride together and stir. If it is not easy to dissolve, heat it or put a little alkali. After dissolution, it is translucent, and then the water amount is below 400mL. Third, dissolve sodium nitrite with 100mL of water. Finally, the three components are mixed together, and the total water amount is 900mL. After

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