GUANGDONG XIEDA INTELLIGENT EQUIPMENT CO., LTD.
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Common surface treatment process for warehouse racking
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Publish Time:
2025-07-18
The common surface treatment process for storage racks includes the following steps, aiming to enhance the corrosion resistance, aesthetics, and service life of the racks. The specific process and technical details are as follows:
Pre-treatment Stage
- Degreasing (Hot Degreasing)
- Function: Removes oil stains and impurities from the steel surface to ensure the effectiveness of subsequent processing.
- Method: Removes grease through chemical or physical methods (such as heating) to prepare for pickling and phosphating.
- Pickling (Rust Removal)
- Function: Removes scale and rust from the steel surface, exposing the metal substrate.
- Method: Soaking or spraying with an acidic solution (such as sulfuric acid or hydrochloric acid) to corrode rust, followed by rinsing with clean water.
- Phosphating (Passivation)
- Function: Forms a phosphate film on the steel surface, enhancing coating adhesion and corrosion resistance.
- Method: Treated with phosphating solution to form a uniform gray or light yellow phosphate film, followed by drying.
Spray Coating Stage
- Electrostatic Powder Coating (Common Process)
- Process:
- Spraying: Using the principle of electrostatic adsorption, epoxy resin powder is evenly sprayed onto the surface of the rack.
- High-temperature Curing: The workpiece is heated to 180±5℃ and kept warm for 15 minutes to allow the powder to melt, level, and cure into a film.
- Advantages: Pollution-free, strong coating, high corrosion resistance, and supports automated production.
- Color: The standard colors are blue (uprights) and orange (beams). Other colors can be customized (additional fees apply).
- Spray Painting (Alternative Process)
- Process: Liquid paint is sprayed directly after room temperature phosphating, and then dried naturally or forced drying.
- Advantages: Good leveling, wide color selection, suitable for complex structure repair.
- Disadvantages: Solvent-containing, polluting the environment, weaker wear resistance and corrosion resistance.
Post-processing and Inspection
- Cooling and Recycling: Recycling scattered powder after powder coating to reduce waste.
- Quality Inspection: Inspecting the uniformity, adhesion, and appearance defects (such as particles and shrinkage) of the coating.
- Packaging and Warehousing: Applying rust-proof packaging to prevent damage during transportation.
The surface treatment process for storage racks typically includes pre-treatment, spray coating, and post-processing and inspection.
Companies can choose appropriate surface treatment methods based on their own needs and actual conditions to improve the performance and service life of storage racks.
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