Surface & Heat Treatment Services

Advanced surface finishing and thermal processing solutions enhance metal durability, aesthetics, and performance. KINGMETAL’s ISO-certified services ensure compliance with industrial standards while optimizing production scalability for OEMs and fabricators.

Solutions Categories

0102030405

Why Partner with KINGMETAL?

• Scalable capacity: Single orders exceeding 2 million pounds.

•Technical consultation: Cost-efficient solutions for coating and heat treatment.

• End-to-end management: Integrated QC, UK-wide logistics, and project oversight.

• Rapid prototyping: Expedited quotes for time-sensitive projects.

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Surface Coating Technologies

Electrostatic Powder Coating Solutions

Dry polymer application via electrostatic charge, cured under heat (180-200°C) for corrosion-resistant finishes. Ideal for steel, aluminium, and alloys. Color range: RAL, Pantone®.
Wet Spray Painting

Conventional liquid coatings for heat-sensitive substrates. Supports thicker layers (≥80 μm) and specialty finishes (metallic, textured).
Hot-Dip Galvanizing

Zinc immersion (450°C bath) for structural steel protection. Complies with ASTM A123. Applications: bridges, chemical equipment.
Anodizing (Type II/III)

Electrochemical aluminum oxidation (5-25 μm thickness). Enhances wear resistance and enables dyeing (architectural, automotive).
Electroplating Services

Metal deposition (Ni, Cr, Zn) via electrolysis. Improves conductivity and abrasion resistance. Thickness: 5-50 μm.
Black Oxide Conversion Coating

Chemical blackening (Fe₃O₄ layer) for reduced reflectivity and moderate corrosion protection. Common in fasteners and automotive components.

Mechanical & Chemical Finishing

Deburring

Mechanical/thermal edge smoothing post-machining. Reduces Ra roughness by 30-50% for precision assemblies.
Abrasive Blasting (Grit/SHOT PEENING)

• Sandblasting: SA 2.5 surface prep for coatings.

• Bead blasting: Glass media for satin finishes (Ra 0.8-1.6 μm).
Electropolishing

Microsurface leveling (≤20 μm removal) for medical/food-grade stainless steel. Reduces bacterial adhesion by 70%.
Passivation (ASTM A967)

Citric/nitric acid treatment to restore stainless steel’s chromium oxide layer. Critical for pharmaceutical and marine applications.
Pickling (ASTM A380)

Acid descaling (HCl/HNO₃) pre-coating. Removes mill scale and weld discoloration.

Thermal Processing Methods

Annealing (Full/Process)

Subcritical heating (550-750°C) to relieve stresses in cold-worked metals. Improves machinability by 25%.
Normalizing

Air-cooled annealing variant for uniform grain structure in low-carbon steels.
Tempering (150-650°C)

Post-quench heating to balance hardness (45-60 HRC) and ductility in tool steels.
Quench Hardening

Rapid oil/water cooling (≥800°C) for martensitic transformation in alloy steels.
Precipitation Hardening (17-4PH, 6061-T6)

Aging cycles (480-620°C) to precipitate secondary phases. Achieves 1500 MPa UTS in maraging steels.
Case Hardening (Carburizing/Nitriding)

• Gas carburizing: 0.8-1.2 mm case depth (AISI 8620).

• Plasma nitriding: 500-600 HV surface hardness for gears and shafts.

Quality & Compliance

• Certifications: ISO 9001, ASTM, EN 1090-2.

• Testing: Salt spray (ASTM B117), cross-hatch adhesion (ISO 2409), hardness (Rockwell/Vickers).

• Delivery: 7-15 business days for UK orders. Global logistics available.

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Frequently Asked Questions

Q: Maximum part dimensions for galvanizing?

A: 12m length x 3m width (hot-dip); 6m x 2m (electrolytic).
Q: Temperature limits for powder coating?

A: Substrates must withstand 200°C for 10-15 minutes.
Q: Lead time for anodizing batches?

A: 5-7 days for Type II; 10 days for hardcoat (Type III).
Q: Materials suitable for black oxide?

A: Carbon steel, stainless steel (modified baths), copper alloys.
Q: Post-quench tensile strength?

A: 4140 steel: 1,000-1,200 MPa (dependent on tempering).

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Submit an RFQ today for a free feasibility report, including recommendations and competitive pricing for your target process.

Explore Our Capabilities

Surface & Heat Treatment Services

Why Partner with KINGMETAL?

Surface Coating Technologies

Electrostatic Powder Coating Solutions

Wet Spray Painting

Hot-Dip Galvanizing

Anodizing (Type II/III)

Electroplating Services

Black Oxide Conversion Coating

Mechanical & Chemical Finishing

Deburring

Abrasive Blasting (Grit/SHOT PEENING)

Electropolishing

Passivation (ASTM A967)

Pickling (ASTM A380)

Thermal Processing Methods

Annealing (Full/Process)

Normalizing

Tempering (150-650°C)

Quench Hardening

Precipitation Hardening (17-4PH, 6061-T6)

Case Hardening (Carburizing/Nitriding)

Quality & Compliance

Frequently Asked Questions

Q: Maximum part dimensions for galvanizing?

Q: Temperature limits for powder coating?

Q: Lead time for anodizing batches?

Q: Materials suitable for black oxide?

Q: Post-quench tensile strength?

Ready to Launch Your Project?