Vantage Specialty Chemicals BandB PCR-1640 (5-USGL-PAIL)

PCR-1640 Prepaint Corrosion Remover

Overview

PCR-1640 Prepaint Corrosion Remover is a concentrated acidic solution specifically formulated to remove corrosion and heavy oxidation from aluminium aircraft surfaces. Designed for use prior to surface finishing processes, it produces a uniform matte finish ideal for conversion coating, painting, anodizing, or welding. The formulation is free from hydrofluoric acid and chromates, offering a safer and effective alternative for aerospace surface preparation.

Key Technical Specs

• Product Type: Acidic corrosion remover / deoxidizer
• Base: Acidic solution (HF-free)
• Finish: Matte aluminium surface
• Flammability: Non-flammable
• Chromates: None
• Mix Ratio: 1:1 with water
• Contact Time: 5-10 minutes

Approvals & Specifications

• Conforms to SAE AMS 1640 Revision C
• Supersedes MIL-C-38334 (Type I, Class I)
• NSN: 6850-00-527-2426 (5 gal), 6850-00-300-9008 (55 gal)

Key Features & Benefits

• Effectively removes corrosion and heavy oxidation from aluminium
• Prepares surfaces for coating, painting, anodizing, or welding
• Thickened formula adheres to vertical and inverted surfaces
• Hydrofluoric acid-free for improved safety handling
• Non-chromated formulation
• Easy to rinse with water
• Safe on acrylic plastics (no crazing, staining, or discoloration per ASTM F484)

Typical Applications

• Aircraft exterior aluminium surface preparation
• Pre-treatment prior to painting or coating systems
• Removal of oxidation before anodizing or welding
• Aerospace MRO corrosion removal processes

Application Process

• Pre-clean surface using approved aircraft cleaner
• Rinse thoroughly with water
• Apply PCR-1640 diluted 1:1 using non-atomizing spray
• Work from bottom to top to prevent streaking
• Agitate surface and allow 5-10 minutes contact time
• Do not allow product to dry on surface
• Rinse thoroughly with water
• Apply conversion coating and paint system as required

Compatibility & Safety Notes

• Avoid contact with glass and high-strength steel (mask if necessary)
• Use appropriate PPE during application
• Refer to Safety Data Sheet before use
• Dispose of product in accordance with local environmental regulations

Packaging & Storage

• Available in pails and drums
• Shelf life: 24 months (sealed, above 10°C)

Why This Product is Chosen for AOG / MRO

• Reliable corrosion removal without aggressive HF chemistry
• Consistent surface preparation for coating adhesion
• Clinging formulation ideal for complex aircraft geometries
• Supports compliant aerospace maintenance processes

Practical Suggestions for Your Team (AOG Mindset)

• Always pre-clean heavily contaminated surfaces for best results
• Monitor dwell time closely to avoid over-etching
• Ensure thorough rinsing before next process stage
• Mask sensitive materials prior to application

Manufacturer / Aviation Spec Codes

• Product Name: PCR-1640 Prepaint Corrosion Remover
• Specification: SAE AMS 1640C
• Type: Aircraft surface corrosion remover
• Application: Prepaint aluminium surface preparation