Surface treatment method for magnesium alloy

Surface treatment method for magnesium alloy

  • CN 104,561,980 A
  • Filed: 01/06/2015
  • Published: 04/29/2015
  • Est. Priority Date: 01/06/2015
  • Status: Active Application
First Claim
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1. a surface treatment method of Mg alloy, is characterized in that comprising the following steps:

  • (1) by magnesium alloy component polishing, material loading;

    (2) the magnesium alloy component immersion after polishing being filled concentration is in the pickling tank of the phosphoric acid solution of 85%, ultrasonication 0.5 ~ 2.5 minute under room temperature, then enters in the first distilled water washing bath, ultrasonication 20 ~ 50 seconds under room temperature, taking-up hot blast drying;

    Immersing afterwards is equipped with in the degreasing tank of sodium hydroxide 5 ~ 30g/L, tertiary sodium phosphate 10 ~ 40g/L, sodium carbonate 12 ~ 40g/L, be heated to 58 ~ 68 DEG C, ultrasonication, after 8 ~ 15 minutes, enters in after-fractionating water washing bath, ultrasonication 20 ~ 50 seconds under room temperature, taking-up hot blast drying;

    Afterwards, then immerse that concentration is housed is in the activated bath of the hydrofluoric acid of 5%, under room temperature, ultrasonication 20 ~ 60 seconds, then immerses in triply distilled water washing bath, room temperature ultrasonic cleaning 20 ~ 50 seconds, taking-up hot blast drying;

    (3) component after step (2) process is put into and filled sodium stannate 40 ~ 90g/L, sodium acetate 5 ~ 40g/L, sodium hydroxide 20 ~ 80g/L and Sodium Fluoride 5 ~ 25g/L film forming treatment trough, be heated to 50 ~ 80 DEG C, with the action of a magnetic field 10 ~ 30 minutes;

    Then put into the 4th distilled water washing bath cleaned by ultrasonic vibration, take out hot blast drying, blanking.

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