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  1. ahzr

    I want to know the kind of chromium

    I want to know the kind of chromium and electroles nikel according to hardness and corrosion/wear resistance ..Etc and wat is the recommended one to be used for valves in contact with water PH 7.5 at temp.35 thank you very much
  2. ahzr

    i have ball valves used in water tr

    i have ball valves used in water transmission system the water is botable water for drinking porpuse with PH 7.5 at 35 C temp. the ball chromium plated and the seat electroless nikel plated, after one year of operation thies parts (ball and seats) start corrosion in all the valves. now we are...
  3. ahzr

    I have (600) ball valves sized from

    I have (600) ball valves sized from 6" to 72",for water pipline transporation system. the problem is that:- the ball of all this valves were protected with electroless nicle + electroless chromium > 50 micron, but after one year of operation we found corrosion in the bore of that...

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