Corrosion resistant water electrolysis polar board surface processing method

Corrosion resistant water electrolysis polar board surface processing method

  • CN 104,532,266 B
  • Filed: 12/13/2012
  • Issued: 06/05/2018
  • Est. Priority Date: 12/13/2012
  • Status: Active Grant
First Claim
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1. a kind of water electrolysis polar board surface processing method, comprises the following steps:

  • A. the polar board surface of carbon steel material is cleaned;

    B. pole plate is immersed in 5min to 15min in acid etching solution, acid corrosion is carried out to polar board surface, the acid corrosion is moltenThe ingredient of liquid is the nitric acid of 8wt% to 15wt%, and the ethanedioic acid of 2wt% to 8wt%, remaining is water;

    C. pole plate is immersed in 3min to 8min in copper ion solution, with copper ion displacement reaction occurs for iron;

    D. pole plate is immersed in 5min to 15min in caustic corrosion solution, caustic corrosion is carried out to polar board surface, the caustic corrosion is moltenLiquid is mixed by the sodium hydroxide solution of 10g/L to 30g/L and the sodium nitrate solution of 10g/L to 30g/L;

    E. pole plate is put into strong acid solution of the concentration more than or equal to 30%, removes the impurity of polar board surface;

    F. pole plate is immersed in 10min to 20min in treatment fluid, protective film, the ingredient of the treatment fluid is formed in polar board surfaceFor the complexon I of 5wt% to 12wt%, the complexing agent of 0.5wt% to 3wt%, the corrosion inhibiter of 0.2wt% to 2wt%,The surfactant of 0.1wt% to 0.5wt, the pH conditioning agents of 0.02wt% to 2wt%, remaining is water;

    The treatment fluidPH value is 3 to 6;

    The complexing agent is sodium citrate;

    The corrosion inhibiter is benzotriazole;

    The surfactant is lauryl sodium sulfate;

    The pH conditioning agents are triethanolamines.

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