Applicable to: 5-series / 6-series aluminum body stamped parts, battery aluminum casings, battery trays, motor aluminum housings, lightweight chassis aluminum stamped components, water cooling plate stamped parts

I. Core Cleaning Pain Points of Aluminum Alloy Stamped Parts (Distinct from Steel Parts)

Aluminum is an amphoteric metal susceptible to corrosion by both acids and alkalis, which serves as the core basis for the design of the entire solution.

1. Surface Corrosion & Discoloration: Strong alkalis/acids, chlorine-containing cleaning agents, and prolonged high-temperature immersion cause aluminum discoloration, loss of luster, pitting corrosion, and intergranular blackening.

2. Water Stains & White Bloom Issues: Calcium and magnesium ions in tap water, residual cleaning agents after rinsing, and uneven drying lead to white speckles, impairing adhesion for welding, bonding and coating processes.

3. Hard-to-Remove Stamping Contaminants: Drawing oil, high-viscosity stamping lubricants, fine aluminum powder, micro burrs from stamping, and residual mold release agents trapped in folds, blind holes and reinforcing ribs.

4. Strict Cleanliness Standards: New energy battery casings and water cooling plates comply with ISO 16232 standards, with residual oil ≤10mg/㎡, particle size ≤100μm, and no free aluminum powder (to prevent short-circuit risks).

5. High Drying Requirements: Residual moisture rapidly forms aluminum oxide film, resulting in sealant delamination, welding pores and electrophoresis pitting defects.

II. Three Mature Process Solutions (Classified by Sinobakr Based on Production Capacity, Cleanliness and Environmental Protection)

Solution 1: Fully Enclosed Vacuum Hydrocarbon / Modified Alcohol Cleaning (Premium Choice for High-End New Energy Aluminum Stamped Parts, Sinobakr BK-CH Series)

Applicable Workpieces

Power battery aluminum casings, water cooling plates, precision motor housings, exterior aluminum body panels, complex deep-cavity stamped parts with blind holes; high-cleanliness production lines for OEMs and zero-waste green workshops.

Exclusive Advantages for Aluminum Materials

1. Neutral solvent with zero corrosivity: No acid or alkali erosion, maintaining the original bright finish of aluminum without oxidative whitening; chloride-free to eliminate pitting corrosion.

2. Vacuum negative pressure penetrates micro gaps as narrow as 0.03mm, completely stripping aluminum powder trapped in stamping folds and interlayers with no blind cleaning zones.

3. Low-temperature vacuum drying (40–60°C) with zero water contact throughout the process, thoroughly eliminating water stains and white bloom.

4. Vacuum distillation regeneration of solvent with a recovery rate of 98%, zero wastewater discharge, VOC levels far below national environmental limits, and compatibility with fully automatic MES-connected production lines.

5. Dual-frequency ultrasonic technology (28kHz for rough cleaning + 40kHz for fine cleaning) with low-power cavitation that preserves the native oxide film on aluminum surfaces.

Standard Fully Automatic Process Flow

Automatic robotic loading → Vacuum high-pressure spray rough cleaning (removal of heavy drawing oil and bulk aluminum scraps) → Dual-frequency ultrasonic solvent fine cleaning → Vacuum displacement rinsing → Steam bath deep micro-particle removal → Low-temperature vacuum drying → Sealed unloading / Cleanliness inspection

Applicable Production Capacity

300–1,000 pieces per batch with a cycle time of 8–15 minutes per batch; compatible with stamping manipulator inline connection for immediate cleaning right after stamping blanking.

Solution 2: Fully Automatic Multi-Tank Aqueous Ultrasonic Cleaning Line (Cost-Effective Solution for Mass-Produced Aluminum Bodies & Battery Trays, Sinobakr BK-WL Series)

Applicable Workpieces

Large aluminum body stamped door panels, battery trays, chassis aluminum brackets, lightweight structural components; mass production lines for phosphating / silane pre-treatment.

Exclusive Anti-Oxidation Process Configuration for Aluminum from Sinobakr

1. Special neutral mild corrosion inhibitor cleaner: pH 6.8–7.8, phosphorus-free, chlorine-free and silicate-free, built-in aluminum corrosion inhibitor to prevent discoloration even after long-term immersion below 50°C.

2. Multi-stage countercurrent pure water rinsing: Three-stage pure water (resistivity ≥10MΩ·cm) for gradient dilution to avoid white bloom caused by residual agents; tap water is prohibited for final rinsing.

3. Low-power dual-frequency ultrasonic system: 28kHz for heavy oil removal, 40kHz for fine aluminum powder clearance, with power density ≤0.4W/cm² to prevent surface corrosion of aluminum.

4. Multi-stage air knife cutting + closed-loop low-temperature drying: High-pressure air knives for water removal, circulating hot air drying at 50–55°C to avoid discoloration from high-temperature oxidation.

5. Integrated oil-water separation + paper tape magnetic filtration system to automatically recover stamping oil and intercept aluminum powder, extending service life of tank liquid by 70%.

Standard Process Flow

Automatic loading → Neutral ultrasonic degreasing (3%–5% special aluminum cleaner, 45–50°C, 2–4 min) → Primary spray rinsing → Secondary ultrasonic pure water rinsing → Tertiary pure water fine rinsing → High-pressure air knife water cutting → Low-temperature hot air drying at 55°C → Chromium-free silane passivation (optional for short-term rust prevention) → Unloading

Applicable Production Capacity

Continuous through-type line with a daily output of 8,000–18,000 pieces, suitable for mass production of large sheet aluminum stamped parts.

Solution 3: CNC High-Pressure Fixed-Point Spray + Hydrocarbon Composite Cleaning (For Complex Perforated Aluminum Stamped Parts, Sinobakr BK-CNC Series)

Applicable Workpieces

Motor housings, electronic control aluminum stamped parts and water cooling flow channel plates with cross holes, threads, grooves and embedded aluminum powder.

Process Logic

5-axis CNC high-pressure water jet (30–50MPa) targets and scours aluminum powder and stamping micro burrs trapped in gaps to remove heavy debris; workpieces then proceed to vacuum hydrocarbon fine cleaning for degreasing and drying, integrating cleaning and micro deburring in one single process.

Aluminum Material Protection Design

Neutral additives mixed with pure water for high-pressure spraying; soft-impact nozzles to avoid scratches on exterior surfaces of aluminum stampings; post-process vacuum solvent drying eliminates oxidation risks from residual water accumulation.