Engineered for Extreme Wear & Anti-Corrosion
At Ningbo Jiehuang Chiyang Electronic Tech Co., Ltd. (JHPIM), we integrate state-of-the-art electroplating and vacuum Physical Vapor Deposition (PVD) coating directly into our metal forming post-processing chain.
Electroplating vs. PVD Nanocoatings
Engineered post-processing designed specifically to address the inherent characteristics of PM and MIM materials, such as micro-porosity sealing and precision dimensional stability.
Industrial Electroplating Systems
Electrochemical deposition provides thick, uniform barrier protection and functional properties. Ideal for sealing iron-base sintered parts, increasing conductivity, and ensuring rust-proofing.
- Electroless & Electrolytic Nickel (Ni): Excellent uniform thickness inside blind holes and deep cavities; ideal for sintered gears.
- Hard & Decorative Chrome (Cr): High wear resistance and bright aesthetic finish for architectural locksets and hydraulic pistons.
- Gold (Au) & Silver (Ag) Plating: Ultra-low contact resistance and high oxidation prevention for electronics and sensor contacts.
- Copper (Cu) Underplate: Essential diffusion barrier and conductive base for complex MIM alloy components.
| Layer Thickness | Standard Salt Spray | Target Substrates |
|---|---|---|
| 5.0 – 25.0 µm | 96 – 500+ Hours | Iron-base PM, Carbon Steels, Brass |
PVD Nanostructured Thin Films
Physical Vapor Deposition utilizes cathodic arc and magnetron sputtering under vacuum to bond atom-level ceramic and carbon coatings without altering strict micron tolerances.
- DLC (Diamond-Like Carbon): Super-low friction (0.05–0.15) with high dry-running capabilities for automotive valve lifters and sliding sleeves.
- TiN (Titanium Nitride): Classic gold-colored high-hardness (2300 HV) film for power tool drive gears and cutting edges.
- TiAlN / AlTiN: High thermal threshold (up to 900°C) suited for severe heat and heavy-duty motor transmissions.
- CrN (Chromium Nitride): Superior toughness and anti-galling performance for high-pressure fluid valves and medical tools.
| Layer Thickness | Operating Hardness | Target Substrates |
|---|---|---|
| 1.0 – 4.0 µm | 2000 – 3200 HV | Stainless Steel (316L, 17-4PH), Tool Steels |
| Performance Criterion | Electroplating (Ni, Cr, Zn-Ni) | PVD Coatings (TiN, DLC, CrN) |
|---|---|---|
| Typical Film Thickness | 5 – 30 µm (Requires tolerance budgeting) | 1 – 4 µm (Negligible effect on precision tolerances) |
| Surface Hardness (HV) | 400 – 1000 HV (Hard Chrome up to 1000 HV) | 1800 – 3200+ HV (Extreme scratch resistance) |
| Coefficient of Friction | Moderate (0.3 – 0.6) | Ultra-Low (0.08 – 0.20) |
| Pore Sealing (PM Alloys) | High (Fills surface micro-pores effectively) | Requires pre-sealed / dense substrate (e.g., MIM / dense PM) |
| Available Color Palette | Silver, Chrome, Bright/Satin Nickel, Gold, Copper | Matte/Gloss Black, Rose Gold, Gunmetal, Blue, Chameleon |
Value Added to Sintered & Machined Components
Combining custom powder metallurgy manufacturing with specialized post-treatments unlocks higher product longevity and premium functional aesthetics.
Superior Anti-Wear & Durability
PVD coatings deliver diamond-grade microhardness to prevent adhesive wear, contact spalling, and surface erosion under continuous mechanical load, multiplying part lifespan by 3x to 10x.
Anti-Fingerprint & Chemical Shield
Hydrophobic and oleophobic (AF) top-sealing prevents sweat corrosion and fingerprint smudging on consumer-facing products like high-end electronic hinges, wearable cases, and smart lock handles.
Premium Cosmetic Finishes
High-vacuum color control produces repeatable metallic colors (Deep Space Gray, Jet Black, Champagne Gold, Pearl Nickel) without peeling or flaking under cyclic thermal conditions.
Engineered for Demanding Industrial Applications
JHPIM supplies global Tier 1, OEM, and industrial distribution clients across diverse demanding industries.
Consumer Electronics
MIM hinge brackets, camera decorative rings, foldable phone structural components with scratch-resistant PVD black and AF anti-smudge finishes.
Smart Locks & Hardware
High-density sintered deadbolts, lock cylinders, planetary clutch gears with corrosion-resistant nickel/chrome and satin brass PVD.
Automotive Powertrain
Variable valve timing (VVT) sprockets, oil pump rotors, seat recliner gears with DLC coatings for reduced parasitic friction losses.
Medical Instruments
Biocompatible MIM 316L/17-4PH surgical clamp jaws, endoscopic articulation joints coated with inert, non-toxic titanium nitride (TiN).
Ningbo Jiehuang Chiyang Electronic Tech Co., Ltd. (JHPIM)
Complete In-House Capabilities: From Powder Metallurgy (PM) & Metal Injection Molding (MIM) to Secondary CNC & Surface Finishing.
⚙️ Precision PM & Sintered Gears
Custom spur gears, helical gears, planetary gear sets, and bevel gears produced with near-net shape technology (material utilization > 95%).
🧩 Complex 3D MIM Micro-Parts
High-density stainless steel and alloy steel micro-components with complex geometries that eliminate high-cost 5-axis CNC milling operations.
📉 20%–50% Direct Cost Savings
Automated powder compacting, continuous sintering lines, secondary CNC sizing, and integrated electroplating/PVD reduce part costs significantly.
Accelerate Your Project with JHPIM Engineering
Send your CAD models (STP / STEP / IGS / DWG) to our metallurgical and surface engineering team. Receive a complimentary DFM report, tolerance risk analysis, and competitive factory-direct quote within 24 hours.