Stronger Surfaces. Smarter Protection. Lasting Results.
Advanced surface finishing solutions for global industries — ED coating, electroplating & metal pre-treatment.
Surface Excellence.
Built on Trust.
At Eternal Gloria, we believe that a great product begins with the surface.
From high-performance e-coating (ED coating) to precision electroplating, we specialize in advanced surface finishing solutions that enhance durability, functionality, and appearance.
Founded in Taiwan, we've earned the trust of global partners through uncompromising quality, efficient processes, and a commitment to continuous innovation. Our goal is simple: to deliver reliable surface treatments that make every part stronger, smarter, and last longer.
Products & Services
Comprehensive surface finishing solutions engineered for performance and precision.
Metal Pre-treatment
Comprehensive metal surface cleaning, degreasing, and priming solutions for optimal coating adhesion and performance.
ED Coating
High-performance electrodeposition coating providing excellent corrosion resistance and uniform coverage for various metal components.
Electroplating
Advanced electroplating services delivering superior metal deposition, enhanced surface properties, and exceptional durability for various applications.
Custom Chemical Solutions
Looking for specific chemical solutions? Contact us to discover our full range of surface treatment chemicals tailored to your needs.
Contact UsED Coating (Electrodeposition) Process
Complete ED Coating Sequence
Cathodic ED Coating
Industry StandardWorkpiece as cathode — mainstream choice for superior performance.
- Superior corrosion resistance
- Excellent durability
- Widely used in automotive industry
- Better film properties
- Longer bath life
Anodic ED Coating
Workpiece as anode — suitable for light-duty applications.
- Good for light-duty applications
- Cost-effective process
- Simple bath composition
- Lower corrosion resistance vs cathodic
- Limited industrial applications
Electrodeposition Coating Technology
ED coating uses an electric field to drive charged paint particles onto conductive metal surfaces:
- Water-based emulsion paint with dispersed polymer particles
- Metal part immersed in e-coating bath and connected to electrode
- Voltage application causes paint migration to metal surface
- Particles form dense, uniform coating layer
- Nearly 100% paint utilization efficiency
Key Process Parameters
- Voltage: Controlled according to coating thickness requirements
- Bath temperature: Typically maintained for optimal viscosity
- Immersion time: Adjusted for desired film build
- pH control: Critical for bath stability
- Curing: 160–180°C for 20–30 minutes (typical)
Superior Coverage
Uniform coating with excellent coverage of complex geometries.
- Reaches recesses and internal surfaces
- Consistent thickness distribution
- Ideal for hollow structures
Environmental Benefits
Eco-friendly water-based coating system.
- Low VOC emissions
- Nearly 100% material utilization
- Reduced waste generation
Excellent Corrosion Protection
Outstanding anti-corrosion performance.
- Dense, pinhole-free coating
- Strong adhesion to substrate
- Long-term durability
Automatic Process Control
Precise film thickness control through automation.
- Self-limiting film thickness
- Consistent quality
- High production efficiency
Electroplating Process
Complete Electroplating Sequence
Zinc Plating (Galvanizing)
Excellent corrosion protection for steel components.
- Superior corrosion resistance
- Sacrificial protection for steel
- Cost-effective solution
- Good paintability
- Passivation in chromate solutions
- Lightening treatment available
Copper Plating
Excellent conductivity and decorative finish.
- Superior electrical conductivity
- Excellent heat conductivity
- Good base for other platings
- Attractive appearance
Nickel Plating
Popular ChoiceOutstanding corrosion resistance and decorative properties.
- Excellent corrosion resistance
- Good wear resistance
- Bright, attractive finish
- Wide application range
Chrome Plating
Superior hardness and mirror-like decorative finish.
- Exceptional hardness
- Mirror-like appearance
- Superior wear resistance
- Low friction coefficient
Electrochemical Metal Deposition
Electroplating deposits a metal coating onto a conductive substrate through electric current:
- Anode: Positive electrode (typically the metal being deposited)
- Cathode: The object being coated (negative electrode)
- Electrolyte bath: Solution containing metal salts
- DC power supply: Provides current for metal deposition
- Metal ions reduced onto cathode surface
Chemical Degreasing
Initial cleaning using caustic soda and degreasing agents.
- Removes heavy oils and contaminants
- Prepares surface for further treatment
- Critical for adhesion quality
Electrochemical Degreasing
Enhanced cleaning using electric current.
- Removes residual oils
- Gas evolution aids cleaning
- Superior to chemical cleaning alone
Etching & Activation
Surface preparation with acids for optimal adhesion.
- Removes oxide layers
- Creates active surface
- Ensures proper metal bonding
Post-Treatment
Final processing for optimal results.
- Multiple stage rinsing (warm & cold)
- Controlled temperature drying
- Optional passivation treatments
Corrosion Protection
- Extended product lifespan
- Barrier against environmental factors
- Sacrificial protection (zinc)
Enhanced Appearance
- Bright, attractive finishes
- Multiple color options
- Improved aesthetics
Functional Properties
- Improved wear resistance
- Enhanced electrical conductivity
- Reduced friction
Surface Modification
- Increased surface hardness
- Improved solderability
- Better paint adhesion
Metal Pre-Treatment Process
Essential Process Sequence
Solvent Cleaning
Cost-effective removal of heavy oils and greases using kerosene, benzene, or naphtha.
- Most economical method
- No skilled labor required
- Suitable for all job sizes
- Fire risk (flammable solvents)
- Labor intensive process
- Effluent disposal concerns
Alkali Cleaning
Superior cleaning with sodium hydroxide-based solutions, ideal for most substrates.
- Room temperature operation
- Simple bath control
- High oil absorption capacity
- Excellent bath stability
- Not suitable for zinc, aluminum, brass
- Avoid in manganese phosphate processes
Emulsion Cleaning
Mild alkali-based cleaners suitable for all substrates, operating at lower temperatures.
- Lower energy consumption (45–50°C)
- Safe for all metal types
- Gentle cleaning action
- Limited cleaning ability
- Requires follow-up alkali cleaning
Vapour De-greasing
Sophisticated closed-system method using low-boiling, non-toxic solvents.
- Excellent for light oils/greases
- Minimal fire hazard
- Low pollution (closed system)
- Safe for operators
- Higher installation cost
- Not effective for heavy oils
- Requires skilled labor
Rust Removal for Metal Surfaces
Rust is the oxide of iron that forms when metal is exposed to humid atmosphere. It must be removed before coating. Rust is readily soluble in acids, making acid cleaning the most effective method.
- Removes rust and mill scale effectively
- Makes surface reactive for phosphating
- More economical than blast or flame cleaning
- No sophisticated equipment required
Hydrochloric Acid Pickling
Most economical de-rusting process, excellent for mill scale removal.
- Cheapest de-rusting process
- Readily dissolves mill scales
- Fast and effective removal
- Suitable for hot rolling operations
- Emits corrosive fumes
- Can damage coating plant atmosphere
- Carryover damages phosphating bath
- Requires stainless steel tank
Sulphuric Acid
Stronger acid suitable for heavily rusted components, requires elevated temperature.
- Most suitable for heavily rusted parts
- Outstanding results in short time
- Elevated temperature (50–60°C) for efficiency
- Corrosive acid fumes at elevated temp
- Inhibitor required to prevent base metal attack
- Carryover permanently damages phosphating bath
Phosphoric Acid
Industry PreferredMost popular de-rusting method in the finishing industry due to superior safety and performance.
- Uniform & fine de-rusting pattern
- Less coarser coating in phosphating
- Lower pitting tendency vs other acids
- No corrosive hazardous fumes
- Carryover does not damage phosphating bath
- Safer working environment
De-Rusting Process Guidelines
- Purpose: Remove rust, mill scale, and oxide layers from metal surfaces
- Not suitable: Avoid in spray application due to corrosive nature
- Carryover prevention: Adequate rinsing between stages is critical
- Tank materials: Choose appropriate tank material based on acid type
Basic Activation (Titanium-based)
Premium activation for superior coating quality.
- Compact, uniform fine crystalline coating
- Superior corrosion resistance
- Suitable for ferrous & non-ferrous substrates
- Provides fine active crystal centres
- Bath stability concerns (titanium colloids)
- Cannot use hard water
Acidic Activation
Economical activation process for ferrous substrates.
- Most economical option
- No bath control required
- Hard water compatible
- Simple operation
- Coarser crystalline coating
- Not suitable for aluminum
Universal Metal Pre-Treatment Method
Phosphating creates chemically bonded metal phosphates on the surface, providing:
- Clean, oil/grease-free surface
- Corrosion inhibitive base for coating
- Non-conductive bond between metal and coating
- Chemically inert surface protection
Tri-Cationic Zinc Phosphating
Industry StandardPremium process with zinc, nickel & manganese for superior performance.
- Superior coating quality
- Excellent corrosion resistance
- Outstanding wear resistance
- Lower sludge generation
- Automotive industry approved
- Suitable for mazak & aluminum
Di-Cationic Zinc Phosphating
Zinc + Nickel combination for enhanced durability.
- Good adhesion (zinc)
- Enhanced corrosion resistance (nickel)
- More durable than mono-cationic
- Withstands corrosive environments
Mono-Cationic Zinc Phosphating
Basic zinc-only process for standard applications.
- Most economical zinc process
- Simple bath composition
- Good basic protection
- Limited corrosion resistance
- Not suitable for harsh environments
Iron Phosphating
Non-crystalline amorphous coating for specific applications.
- Can be welded before coating
- Outstanding mechanical properties
- Dark bluish color
- Molybdate accelerated
- Limited use in industry
- Non-crystalline structure
Important Processing Notes
- Maximum immersion time: 10 minutes (prevents coating dissolution)
- Bath pH range: 4.8–5.5 (depending on concentration)
- Process completes within 2 minutes maximum
- Chemical reaction stops after crystalline layer formation
Tri-Cationic Zinc Phosphating
Adapted phosphating process for aluminum substrates.
- Use mild de-greasing chemicals only
- Replace de-rusting with permuting process
- Permuting: 10% caustic solution, 1–2 minutes
- Avoid strong chemicals (excessive etching)
- Aluminum ions can poison phosphating bath
- Not widely adopted in industry
Chromate Conversion
Alternative conversion coating available in multiple colors.
- Green chromate
- Yellow chromate
- Colorless chromate
Trusted by Industry Leaders
Proud to serve leading manufacturers in Bangladesh's top 10 conglomerates.
Meghna Group
Bicycle Manufacturing
Leading manufacturer in Bangladesh's top 10 conglomerates
RFL Group
Bicycle Manufacturing
Premier manufacturer in Bangladesh's top 10 conglomerates
AKIJ Group
Bicycle Manufacturing
Innovative manufacturer in Bangladesh's top 10 conglomerates
Oshochem
Metal Treatment
Long-standing partner in metal treatment chemical solutions
Quality Management
Every product passes through rigorous quality checkpoints from raw material to delivery.
Raw Material Selection
Premium chemical components sourced from certified international suppliers with full traceability.
Quality Control
Rigorous chemical testing and analysis at every production stage ensures consistency.
Performance Testing
Comprehensive salt spray, adhesion, and corrosion testing to ensure optimal performance.
Delivery & Support
Reliable global delivery with ongoing technical support from our experienced team.
Contact Us
Ready to elevate your surface finishing? Our experts are here to help.
Eternal Gloria Industrial Co. Ltd
Surface Finishing Specialists — Taiwan