Analysis of the Manufacturing Process for All-Steel Laboratory Workbenches: From Raw Steel Plates to Corrosion-Resistant, Wear-Resistant Precision Equipment

With its robust structure, superior load-bearing capacity, fire resistance, corrosion protection, and exceptional durability, all‑steel laboratory benches have become the standard equipment in research, medical, chemical, and testing laboratories. Many customers are familiar with their outstanding performance but may not realize how an ordinary industrial steel sheet, through meticulous and standardized manufacturing processes, is transformed into a high‑quality bench capable of meeting the demanding requirements of laboratory environments.

I. Deep Pre-treatment of Steel Plates: Thoroughly Clean the Substrate to Lay a Solid Foundation for Quality

The surfaces of factory‑produced steel plates typically harbor scale, rust, oil residues, dust, and other contaminants. If these are directly subjected to coating processes, the resulting finish is prone to peeling, flaking, and cracking, significantly reducing the equipment’s service life. Consequently, comprehensive substrate pretreatment is a critical preliminary step that determines the quality and longevity of all‑steel laboratory benches. We employ a standardized, multi‑stage treatment process to thoroughly clean and prepare the substrate.

1. Double degreasing process

Through a dual‑stage process of pre‑degreasing followed by main degreasing, high‑temperature alkaline solutions are uniformly sprayed across the entire surface, thoroughly removing mill oils, drawing lubricants, and various adherents from the steel sheet. This eliminates surface contaminants at the source, ensuring optimal adhesion in subsequent processes.

2. High-pressure multi-stage flushing with clean water

After degreasing, the sheet is rinsed multiple times with high-pressure clean water to thoroughly remove residual alkaline solutions and detached contaminants from the surface, thereby preventing chemical residues from compromising the precision of subsequent processes and ensuring a clean, impurity-free steel‑plate surface.

3. Pickling to remove rust and oxide scale

Utilizing a specialized acid‑solution formulation process, it precisely removes stubborn oxide scale and rust layers from the steel plate surface, restoring the underlying metal to its pristine silvery‑white finish. At the same time, it creates a uniform microporous surface structure, providing an excellent adhesion substrate for the phosphating process.

4. Fine-tuned neutralization and surface conditioning

The neutralization process removes residual acid from the sheet surface, preventing corrosion caused by acid–alkali residues. Subsequently, a surface conditioner optimizes the steel’s micro‑surface structure, ensuring a more uniform and denser phosphating film and enhancing overall protective performance.

5. Core Phosphating Process

Phosphating is a critical process that ensures the corrosion resistance and durability of all‑steel laboratory workbenches. After preliminary surface treatment, the steel sheets are immersed in a specialized phosphating solution, forming a uniform, dense, gray‑black phosphate conversion coating on their surfaces. This coating serves three key functions: it significantly enhances the steel’s inherent rust‑preventive properties; it dramatically improves the adhesion of powder coatings; and, even if the coating sustains minor scratches, it effectively inhibits the spread of corrosion, preventing localized rusting and peeling, thereby safeguarding the equipment’s long‑term stability at its core.

II. Dust-Free Baking Pre‑Treatment: Eliminates Defects and Ensures Coating Precision

After phosphating, the steel sheets are conveyed into a dedicated drying tunnel for constant‑temperature drying, thoroughly evaporating both internal and surface moisture to prevent moisture residues that can cause coating blistering and delamination.

After drying is complete, all boards are transferred to… Fully Enclosed Dust-Free Cleanroom Pre‑treatment is carried out. Throughout the process, personnel wear dust‑free protective gear and employ high‑pressure air blowing and meticulous wiping with specialized adhesive cloths to remove even the tiniest dust particles and contaminants from the panel surfaces. Every detail is rigorously controlled to eliminate minute pollutants such as hair fibers and microscopic dust, thereby preventing post‑spraying defects like pinholes, bumps, and uneven paint finishes, and ensuring a smooth, flawless coating.

3. Electrostatic Powder Coating: Formed by electrostatic adsorption, providing full‑coverage with no dead angles.

Electrostatic powder coating is the core process that determines the appearance, texture, and protective performance of laboratory workbenches. Leveraging mature high-voltage electrostatic spraying technology, it ensures uniform coating adhesion and tight bonding.

The equipment’s spray gun is equipped with a negative high voltage of 60–100 kV, ensuring that powder particles are uniformly charged with negative polarity. Meanwhile, the steel substrate is grounded and carries a positive charge; under the influence of the high‑voltage electrostatic field, the powder particles are strongly attracted to and firmly adhered to the surface of the sheet. Whether on flat surfaces, edges, welds, or in recesses and crevices, uniform, all‑around coverage is achieved, with no missed areas, thin coatings, or dead angles.

We carefully select Epoxy-Polyester Hybrid Powder Coating It combines high hardness, excellent corrosion resistance, superior impact resistance, and outstanding wear resistance, effectively withstanding the corrosive effects of laboratory acids and bases, organic solvents, and high‑frequency friction. Additionally, it supports custom color options in shades such as light gray, warm white, and deep blue, seamlessly integrating with diverse laboratory interior designs and specific application requirements.

4. High-Temperature Curing: Cross-linking forms a film, creating a high-strength protective layer.

After spraying, the panels are automatically conveyed into a constant‑temperature curing oven, where they are baked at 180–200°C for 15–20 minutes. Under these high‑temperature conditions, the powder coating fully melts and flows, undergoing a polymer crosslinking reaction that ultimately cures to form a smooth, dense, tough, and stable integrated protective coating.

After high-temperature curing, the panel achieves coating adhesion that meets the industry’s highest Grade 0 standard, with a pencil hardness of ≥2H. It withstands salt-spray testing for 500 hours without any rust, exhibiting exceptional resistance to corrosion, scratching, and aging, making it ideally suited to the demanding conditions of laboratory environments.

5. Air Cooling and Triple Full Inspection: Rigorous quality control ensures factory‑grade quality.

Once cured, the panels are allowed to cool naturally or undergo forced air cooling until they reach room temperature, after which they proceed to a final, rigorous quality‑inspection stage. We employ triple‑layered professional testing to strictly control the出厂质量 of every panel, ensuring that no defective products make it into the assembly process:

1.  Film thickness measurement : High-precision film-thickness gauges are used to ensure that the coating thickness remains consistently within the 60–80 μm range, with uniform thickness and consistent protective performance.

2.  Cross-Cut Adhesion Test : According to the grid‑cut adhesion test, when tested with a dedicated adhesive tape applied and peeled off, the coating exhibits no delamination or flaking, meeting the required adhesion standards.

3.  Impact resistance test : A 1 kg standard hammer is dropped vertically from a height of 50 cm; the coating exhibits no cracking, peeling, or damage, demonstrating excellent impact resistance.

All板材 must pass all three inspections before proceeding to bending, welding, and final assembly, ensuring the quality of every laboratory bench right from the source.

Why choose our all-steel laboratory bench?

Relying on Substrate pretreatment + phosphating protection + electrostatic powder coating + high-temperature curing + stringent quality control With a complete set of standardized, hardcore manufacturing processes, our all-steel laboratory workstations transcend the performance limitations of conventional cabinet‑type equipment, boasting five key advantages:

✅ Resistant to strong acids and strong alkalis, suitable for a wide range of chemical laboratory applications.

✅ Resistant to repeated wiping with organic solvents; no wear and tear during everyday cleaning.

✅ High hardness, scratch-resistant and impact-resistant, suitable for high-frequency use.

✅ The high-temperature cured coating boasts excellent stability, remaining colorfast and unchanged over long-term use.

✅ Phosphating primer provides double-layer rust protection, offering long-lasting corrosion resistance for ten years—no rust, no peeling.

Precision manufacturing processes and stringent quality‑control standards ensure the equipment’s long‑term, stable performance, providing laboratories with reliable, secure, and durable infrastructure support.