English
During rolling, storage, and transportation, steel plates develop mill scale and varying degrees of rust. If these contaminants are not removed, they will directly affect subsequent coating quality and product service life. Shot blasting is a core process in steel plate surface preparation, widely used in shipbuilding, steel structure, and container manufacturing industries.
Steel plates require surface preparation before leaving the factory or prior to processing to remove mill scale and rust, providing a clean and rough surface for coating. Whether for marine plates, bridge plates, or container plates, shot blasting is a critical step in ensuring coating adhesion and corrosion protection life.
Removal of Mill Scale
The mill scale layer formed during the hot rolling process of steel plates is dense, brittle, and has weak adhesion to the base material. Shot blasting uses high-speed abrasive impact to completely remove the mill scale layer, exposing the metal substrate.
Removal of Rust
Steel plates are affected by air humidity and temperature during storage and transportation, leading to surface rust. Shot blasting effectively removes various types of rust, restoring the original metal appearance.
Creation of Uniform Roughness
After shot blasting, the surface develops a uniform anchor pattern rough structure, increasing the contact area between coating and steel plate and significantly enhancing adhesion.
Improvement of Production Efficiency
Roller conveyor shot blasting machines enable continuous automatic cleaning of steel plates, replacing manual grinding and acid pickling, and greatly improving production efficiency.
Roller Conveyor Shot Blasting Machine
This is the standard equipment for steel plate surface preparation. Steel plates are continuously conveyed by rollers at a constant speed through the blasting chamber. Multiple blast wheels arranged above, below, and on the sides ensure uniform cleaning of both the top and bottom surfaces of the steel plates. The equipment can be integrated with painting processes to form a complete pretreatment production line.
After shot blasting, steel plates achieve a surface cleanliness of Sa2.5, displaying a uniform metallic luster with no visible mill scale or rust. The surface roughness is moderate, providing an excellent adhesion base for subsequent coating. The cleaned steel plates can proceed directly to painting or cutting processes.
Zhiling Machinery provides customized shot blasting solutions for the steel plate preparation industry. The equipment features wear-resistant liners, high-efficiency dust collection systems, and PLC intelligent control. The number of blast wheels, power, and conveyor speed can be configured based on steel plate width, thickness, and production requirements. We have supplied equipment to numerous steel processing enterprises and shipyards both domestically and internationally.
Different steel plate processing facilities may require different levels of automation and production capacity depending on their applications and output requirements.
For standard steel plate cleaning operations in shipbuilding, steel fabrication, and container manufacturing, a dedicated steel plate shot blasting machine provides efficient removal of mill scale and rust while ensuring consistent surface cleanliness and roughness.
When manufacturers require a fully integrated pretreatment process, an automatic steel plate shot blasting production line can combine blasting, dust collection, painting, and conveying systems into a continuous workflow. This configuration is particularly suitable for large-scale production environments where high throughput and stable coating quality are critical.
In certain situations, such as on-site maintenance, bridge rehabilitation, large steel structure installation, or localized surface refurbishment, mobile shot blasting machine can provide flexible cleaning capabilities without transporting workpieces back to the factory. This solution is especially useful for field operations where conventional conveyor-type equipment cannot be deployed.
Selecting the appropriate solution depends on steel plate dimensions, production volume, automation level, and whether cleaning is performed in a factory environment or directly at the project site.
