Trivalent chromium corrosion resistance chemical composition coating and trivalent chromium chemical conversion treatment solution

Trivalent chromium corrosion resistance chemical composition coating and trivalent chromium chemical conversion treatment solution

  • CN 102,268,667 B
  • Filed: 08/04/2008
  • Issued: 08/10/2016
  • Est. Priority Date: 08/03/2007
  • Status: Active Grant
First Claim
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1. the trivalent chromium chemical composition coating formed with chemical conversion treatment solution process, it is characterised in that it is in zinc-plated or platingThe trivalent chromium chemical composition coating formed on the surface of kirsite, corrosion-resistant in salt spraytest of this trivalent chromium chemical composition coatingProperty i.e. white rust time of origin be more than 96 hours, the 6 valency chromium concns with metallic atom conversion in chemical composition coating are not enough0.01μ

  • g/cm2, the stripping quantity of 6 valency chromium after 80 DEG C of humidity of temperature are placed 30 days for 95% time in constant temperature and humidity cabinet is less than 0.05 μ

    g/cm2, stripping quantity when described stripping quantity is to be impregnated 10 minutes in the hot water of temperature 100 DEG C by film,Trivalent content of chromium ion in described chemical conversion treatment solution is 0.002~

    0.5mol/L, and 6 valency chromium ion concentrations are 1ppmHereinafter, cobalt ion content is below 250ppm, with the sulphur atom conversion organosulfur compound containing 100~

    1500ppm scopes.

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