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    CHEMICAL PRE-TREATMENT   ZINC PHOSPHATING


    The term zinc phosphating describes the application of a protective layer in order to protect iron component parts.

     

    When is it necessary to zinc phosphate?

    After the degreasing and the degreasing and pickling of steel parts respectively, a zinc phosphate coating should be applied in order to achieve the optimal protection against corrosion and sub-surface migration for the component part.
     


     


    Which ways of zinc phosphating are there?

    There is the possibility of applying the zinc phosphate layer by spraying. However, as zinc phosphating reacting with aerial oxygen tends to become mud we have chosen to use the immersion process.
     



    Our plant is equipped with three zinc phosphating baths, which may be used simultaneously, if required. The average phosphating time for steel is roughly 5 minutes. After the phosphating process the component parts must be rinsed in triple cascade with desalinated water, after that a passivation layer is applied.

     

    Why do we expend such an effort?

    Using this system we can achieve a resistance of more than 1,000 hours in the salt spray test with a subsequent powder coating. We offer this high standard to all our customers.


    Zinc phosphating and powder coating
    after 1,000 hours of salt spray test.




    Iron phosphating and powder coating
    after 1,000 hours of salt spray test.


     

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     chromalising degreasing pickling CHEMICAL PRE-TREATMENT
     

     

 

 

 

 

 

 

 

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Leistner Hans GmbH - preamble  >> INTELLIGENT COATING TECHNOLOGY