Underwater Christmas tree forge piece surface anticorrosive paint and preparation method thereof
An underwater Christmas tree and anti-corrosion paint technology, applied in anti-corrosion coatings, special surfaces, and devices for coating liquids on surfaces, etc., can solve problems such as low equipment overhaul cycles, and achieve improved service life, reduced porosity, and excellent properties. Effect
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specific Embodiment 1
[0041] 1) Select a square forging base material test block with a size of 100 mm╳100 mm, and wash the surface of the forging and steam degreasing to maintain the cleanliness and lubricity of the surface of the forging.
[0042] 2) The surface of the workpiece is treated by sandblasting, using 30# sand blasting, the pressure range of compressed air is 0.8MPa,
[0043] The distance between the nozzle and the surface of the workpiece is 80 mm-150 mm, and the inclination angle of the nozzle is 40°; during sandblasting, move the nozzle back and forth to make the surface of the workpiece evenly sprayed until the surface of the workpiece is silver-gray.
[0044] 3) Use air spray equipment to spray paint on the surface of the workpiece. When the spraying air pressure is 0.5Mpa, the spray gun keeps running at a right angle and parallel to the workpiece surface. The moving speed of the spray gun is 40cm / s, and it keeps moving at a constant speed. The distance between the spray gun and...
specific Embodiment 2
[0055] Use air spray equipment to spray paint on the surface of the workpiece. When the spraying air pressure is 0.5Mpa, the spray gun keeps running at a right angle and parallel to the workpiece surface. The moving speed of the spray gun is 30cm / s, and it keeps moving at a constant speed. The distance between the spray gun and the surface of the workpiece to be coated is 30cm.
[0056] After spraying and drying, the dry film thickness was measured by a film thickness testing instrument according to the ISO 19840 standard, and five relatively dispersed position points were randomly selected, each point was measured once, and all measurement data were recorded. The measured dry film thickness of the primer was 50 μm, the intermediate dry film thickness is 100 μm, the top coat dry film thickness is 250 μm, and the total dry film thickness of the paint is 400 μm.
specific Embodiment 3
[0057] Use air spray equipment to spray paint on the surface of the workpiece. When the spraying air pressure is 0.5Mpa, the spray gun keeps running at a right angle and parallel to the workpiece surface. The moving speed of the spray gun is 60cm / s, and it keeps moving at a constant speed. The distance between the spray gun and the surface of the workpiece to be coated is 30cm.
[0058] After spraying and drying, the dry film thickness was measured by a film thickness testing instrument according to the ISO 19840 standard, and five relatively dispersed position points were randomly selected, each point was measured once, and all measurement data were recorded. The measured dry film thickness of the primer was 80 μm, the intermediate dry film thickness is 125 μm, the top coat dry film thickness is 445 μm, and the total dry film thickness of the paint is 650 μm.
[0059] The comparison of the paint layer porosity of the three schemes is shown in Table 2.
[0060] Table 2 The ...
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Abstract
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