A decorative corrosion-resistant protective layer on the surface of iron and steel parts, its preparation method and application
A protective layer and corrosion-resistant technology, which is applied in the coating process of metal materials, etc., to achieve the effect of simple equipment, high color saturation and color fastness, and good color uniformity
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Embodiment 1
[0027] First use alkaline solution to remove the oil on the surface of the T-shaped steel piece, then rinse it in tap water at room temperature for 2 minutes, then pickle the T-shaped steel piece with 15vol.% hydrochloric acid for 10 minutes, and remove the pickled T-shaped steel piece from pickling Immediately rinse in tap water at room temperature for 2 minutes after removal from the solution. Put the cleaned T-shaped steel piece into the phosphating solution heated to 60°C and keep it warm for 20 minutes. After taking it out of the phosphating solution, a porous phosphating film layer can be obtained on the surface of the T-shaped steel piece. Rinse the T-shaped steel piece after phosphating treatment in hot water heated to 75°C for 2 minutes, then put it in tap water at room temperature for 5 minutes, then put it in room temperature oxidizing liquid for 1 minute, take it out of the oxidizing liquid at Stay in the air for 10 minutes, and then immerse in 3wt.% sodium carbona...
Embodiment 2
[0034] The difference from Example 1 is:
[0035]First remove the oil on the surface of the angle iron, then rinse the angle iron in tap water at room temperature for 1 minute, then pickle the angle iron with 20% hydrochloric acid for 5 minutes, take the angle iron after pickling out of the pickling solution Rinse immediately in room temperature tap water for 1 minute. Put the cleaned angle iron into the phosphating liquid heated to 70°C and keep it warm for 10 minutes. After taking it out from the phosphating liquid, a porous phosphating film layer can be obtained on the surface of the angle iron. Rinse the angle iron after phosphating treatment in hot water heated to 80°C for 1 minute, then put it in tap water at room temperature for 10 minutes, then soak it in room temperature oxidizing liquid for 5 minutes, take it out of the oxidizing liquid in air Stay in the medium for 5 minutes, and then immerse in 5% sodium carbonate solution for 3 minutes for neutralization treatmen...
Embodiment 3
[0042] The difference from Example 1 is:
[0043] First remove the oil stain on the surface of the 45# parts, then put the 45# parts into tap water at room temperature and rinse them for 2 minutes, then use 17% hydrochloric acid to pickle the 45# parts for 7 minutes, and the 45# parts after pickling Rinse the parts in tap water at room temperature for 2 minutes immediately after removal from the pickling solution. Put the cleaned 45# parts into the phosphating solution heated to 66°C and keep it warm for 14 minutes. After taking it out from the phosphating solution, a porous phosphating film layer can be obtained on the surface of the 45# parts. Rinse the 45# parts after phosphating treatment in hot water heated to 77°C for 1 minute, then put them in tap water at room temperature for 8 minutes, then put them in room temperature oxidizing liquid for 3 minutes, take them out from the oxidizing liquid Stay in the air for 6 minutes, then immerse in 4% sodium carbonate solution fo...
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Abstract
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