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What are the requirements for rust removal of sand blasting machine accessories?


Dongguan Meijun Sandblasting Equipment Production Wholesale Sandblasting Machine Parts , Boron Carbide Nozzle , Sandblasting Gun , Sandblasting Tube , CLEMCO Air Control Sand Control Valve , Sandblasting Helmet , Sandblasting Suit , Air Control Sand Control Valve , Brown Corundum , Pressure Sand blasting machine , ceramic beads and other products, telephone 0769-82261696 13215392671 We will do our best to serve you!

Commonly used rust removal methods for sand blasting machine accessories are dry blasting, wet blasting, dustless blasting and high-pressure water blasting. The dry blasting dust is large, which is harmful to environmental protection and harmful to health; although the wet method is free of dust, the moisture will make the surface rust again. The preventive method is to add 1% to 15% of rust inhibitor (trisodium phosphate, sodium carbonate, sodium nitrite, etc.) and emulsifier or soapy water in water to make the surface no longer rust in a short period of time, and then Apply maintenance primer.

Derusting is the use of compressed air to spray a certain size of sand on the rusted surface of the part through a spray gun.It not only removes rust quickly, but also prepares the surface for painting, spraying, electroplating and other processes. It meets the requirements of clean and rough surface, thus improving the binding force between the cover layer and the parts.

1. Quality requirements for rust removal ①All steel surfaces to be coated with water-based inorganic zinc-rich coatings must be sandblasted to meet ISO8501-1 (GB8923-88) Sa2.5 requirements.
② When repairing the coating locally, the surface of the steel must be polished to ISO8501-1 (GB8923-88) St3.
2. Surface roughness requirements: The surface roughness requirements should be controlled within the range of 35 to 65 μm.
3. Abrasive ① In order to ensure that the steel surface reaches the specified cleanliness and surface roughness after shot blasting or blasting, it is recommended to use stainless steel sand with a grain size of 0.3-0.8mm.
Abrasives used for sandblasting machine accessories should be clean and dry, and should not be contaminated by organic matter.
4. Compressed air: compressed air for sandblasting, the pressure should not be lower than 0.5 Mpa

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