How To Deal With Zinc Plating Troubleshooting?


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    This blog post will help you if you find that troubleshooting is challenging. g.As a result, electroplating will almost certainly have several disadvantages, as evidenced by the complexity of the steps. Common plating errors often include plating problems such as cold welding, pitting, sharp edges, cracks, and poor workmanship. Chipping or loss of adhesion may occur during coating.





    Q: I have two alkaline galvanizing baths with a capacity of 1200 l using Zn Metal 8 g / l, NaOH 120 g / l, and sodium carbonate 100 g / l 30-35 min (5V from one hundred and eighty to 200 amperes), but from 10 working days it takes 70-80 minutes to obtain 8-12 micrometers in two baths, while maintaining the same parameter values. I checked the manufacture, the rectifier is normal. I checked the concentration of the solution as shown above. What could be causing this important problem?

    A: The coating speed, or possibly the efficiency of the cathode, can be influenced by a number of functional variables, which pwill differ in your current alkaline non-cyanide coating solution. Review the list of the following variables.

    1. Metallic zinc. Low concentrations of metallic zinc lead to a slow acceleration of the coating process or a decrease in cathode efficiency. The performance parameters of zinc metal may vary depending on the enzyme supplier. Keeping the zinc metal centralization at 12 to 15 g / L is likely to help improve the coating rate. It is also a good idea to check with your trusted supplier if any proprietary additives are needed after elevating zinc metal levels.

    2. Temperature. Low hot shower temperatures can also result in slower coating rates or lower cathode efficiency. Maintaining the operating temperature between 26 ° and 35 ° C can speed up the coating process.

    3. Sodium carbonates. High exposure to sodium carbonates will result in slower stopping rates or cathode use. Sodium carbonate concentration above 74 g / l can be veryReduce the rate of application of the coating. It is recommended to keep the sodium carbonate content below 85 g / l. A very common treatment for the best soda ash is to help you “freeze the batch” when time permits. When the weather does not allow, the real spa treatment will be in second place.

    4. Patented products. Excessive use of LIGHT COLORS and DETERGENTS can reduce the overall coating rate, also known as cathode efficiency. It is recommended that your supplier analyzes the coating for the optimum concentration of additives.

    Checking the bath can indicate low levels of zinc metal and high levels of sodium carbonate. Adjusting the concentrations of zinc metal and therefore soda ash will be a very good starting point for improving overall coating speed.

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  • Q: Dear sir, I am doing two alkaline zinc baths – one – one and a half thousand liters of metallic zinc – 8 g / l 9 NaOH – 120 g / l; the other concerns 2500 liters of metallic zinc – 9.02 g / l, NaOH – 130 g / l. I do the same coating on regular carbon stainless steel and alloy carbon steel. My personal bubbles heat the same component by over 100 degrees Celsius at the same time. Lagging bubbles are still very often observed in these clad documents. The process sequence is as follows: 1-Hot soak 2-WR xc 3-Pickle 4-WRx2 5-Hot anode 6-WRx3 7-Acid activation 8-WRx2 9-NaOH neutralizer 10-Galvanization 11-Drag offers 12- WRx3 13- Nitrogen only passivation 14- Tri-passivation 15-WRx2 Please 16-Sealer tell me the solution to the same situation and send me the preprocessing chain for the same if it is different from the existing one. Many thanks.

    A: One of the most difficult surfaces to process in the alkaline galvanizing process without hydrocyanic acid is steel with a high water content and / or heat treated steel. Although human substrates are difficult to handle, better adhesion can be achieved with a precise pre-treatment sequence.

    zinc plating troubleshooting

    There are two main options for pretreating heat treated high carbon steel substrates. In any case, these parameters will do exactly what you would expect from a great preprocessing technique. They remove oils, excess lime and soot / carbon found on high carbon or heat treated substrates.

    Option # 1 is also similar to Option # 2. First, use an acid inhibitor in your cucumber brine. An acid inhibitor will significantly reduce or even eliminate carbon build-up on the surface of any of our carbon-rich or heat-treated substrates. Excess surface carbon on all substrates will significantly reduce the overall adhesion of zinc deposits. Secondly, both options operate independently of anodic scrubbing prior to the introduction of the alkaline non-cyanide coating solution. In most cases, backwashing or anodic cleaning is required to remove carbon foam. As mentioned earlier, carbon always remained on the substrate before it could be coated.tie, which reduces the adhesion of zinc coating.

    temperature – from 65 ° to 85 ° C
    concentration – from 60 to 90 g / l
    duration – from 4 to # 6 minutes

    temperature – from 65 ° to 85 ° C
    concentration – from 60 to 90 days g / l *
    duration – from 4 to 6 minutes
    current density – from 2 to 15 amperes / dm2

    consumption – from 4 to 8 liters per minute
    temperature – environment

    Cucumber hydrochloric acid – temperature – environment – concentration – from 20-30 to 50 vol .-%
    time – from 8 to 5 minutes
    acid – chemical from 0.2 to 2.0 vol. -%

    flow rate – from 4 to large liters per minute at room temperature

    ELECTROCETIC zone – temperature – environment – concentration – from 100 to 1 g / l sodium hydroxide – time – from 1 to 2 minutes
    current density – from 2 to 15 amperes / dm2

    temperature – from 65 ° to 85 ° C
    concentration – from 60 to 90 g / l
    duration – from 4 to 8 minutes

    Consumption Selling price – from 4 to 8 liters per month
    Temperature – Environment

    Cucumber hydrochloric acid – temperature – environment – concentration – only from 30 to 50% by volume
    time – from 3 to 5 minutes
    acid inhibitor – from 0.2% to 2.0%, and also by volume

    zinc plating troubleshooting

    Consumption – from three to 8 liters per. Minute and ambient temperature

    HOT ALKALINE ELECTRIC CLEANER – temperature – 65 ° to 85 ° C successfully
    concentration – 60 to 80 g / l * duration – 4 to 6 minutes
    current weight – 2 to 15 amperes / dm2

    Flow rate – 4 or 8 liters per minute
    Room temperature

    As you can see, Option 1 is probably the best option for your application. Ultimately, a simple modification of the NaOH neutralizer will be required to improve the overall quality of the coating.


    Jeff Grodecky is the new director of technical support for Columbia Chemical Corporation. His st Bachelor’s degrees include degrees in chemistry and biology from the University of Trieste. Jeff works closely with sales and customers, often with distributors and end users, to address galvanization issues and related analyzes. During his eleven years in marketing, he has worked with clients around the world, including South Tiongkok, Africa, Brazil, Indonesia, Vietnam, Spain, Thailand and Italy. He has extensive experience in a number of finishing areas including the automotive, home appliance and online metal finishing markets. Overall, Jeff looks forward to answering your questions about zinc and zinc alloy absorbers. Feel free to share your fears online.



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    Why is my zinc plating dull?

    Q: If I am galvanized, why are my things really boring gray? A: Most of the working time is associated with the wrong care solution (bleach) for the coating tank. A: This is mainly due to the type of lightening film on zinc that interferes with passivated adhesion.

    How many volts do I need for zinc plating?

    THEORY: Electroplating is the process of applying zinc to inexpensive metal such as flat iron, etc. Electroplating is used to protect iron from rusting. When used as a silent solution, the main voltage should be around 2.4 or 3 volts. When using a coating drum with this solution, the actual pressure should be between 6 and 10 volts.

    What causes pitting in electroplating?

    If pitting occurs, it is almost always the result of possible preparation, poor cleaning, or defects in the base metal. Improper growth, polishing, or BP sanding can leave minimal visible surface debris that must be completely removed prior to overcoating.




    Rozwiazywanie Problemow Z Cynkowaniem
    Felsokning Av Forzinkning
    Fehlersuche Bei Der Verzinkung
    Problemen Met Verzinken Oplossen
    Solucion De Problemas De Galvanizado
    Poisk I Ustranenie Neispravnostej Cinkovaniya
    Depannage De Zingage
    Risoluzione Dei Problemi Di Zincatura
    아연 도금 문제 해결