1. Surface treatment: first use the Angle mill to clean up the scale on the surface of the leaking part, and then use the electric mill to clean the surface at the right Angle welding position, polish the surface thoroughly with sandpaper, expose the original metal color, and then clean the surface thoroughly with anhydrous ethanol.

2. Material mixing: mix 1321 materials evenly at a ratio of 3:1 until the color difference disappears.

3. Material application: focus on cleaning the adjusted 1321 material to protect the weld, and then use 1321 material to protect the large area of corrosion.

4. Curing time: curing time is usually 24 hours /24℃(material temperature). When the temperature of the material increases by 11℃, the curing time is halved, but the temperature rise should not exceed the temperature that the material can withstand.