Material system
PVD
Bronze Finish
PVD bronze finish: 304 stainless steel substrate with atomic-level ceramic coating (ASTM A240, ASTM B968). Fadior specifies 304 food-grade stainless steel (18-20% Cr, 8-10.5% Ni per ASTM A240) as the substrate for all PVD bronze applications, selected for its pre-existing passive oxide layer that provides corrosion resistance independent of the coating system. The Physical Vapor Deposition process occurs in Salvagnini-integrated vacuum chambers operating at 10⁻³ to 10⁻⁵ mbar, where solid titanium-aluminum or zirconium targets are ionized via cathodic arc evaporation. Reactive gases—nitrogen at 150-300 sccm flow rate with argon carrier—combine with vaporized metal to form TiAlN or ZrN ceramic lattices bonded at 0.3-5 microns thickness directly to the steel surface. Fadior engineering selects TiAlN for interior applications requiring maximum hardness (2400 HV target) and ZrN for enhanced UV stability in exterior-rated installations; the specific gas ratio determines optical interference patterns that yield warm bronze (L* 45-55, a* 8-12, b* 18-25 per CIE Lab) without organic pigments. This atomic bonding distinguishes PVD from electroplating, which relies on 5-25 micron copper-nickel underlayers susceptible to galvanic corrosion and interlayer migration. The ceramic-metal composite structure achieves 2000-2400 HV surface hardness per ASTM B968—10.7-12.8× harder than untreated 304 stainless steel (187 HV)—while retaining the substrate's ductility for forming operations.
Composition & Grade PVD bronze finish: 304 stainless steel substrate with atomic-level ceramic coating (ASTM A240, ASTM B968). Fadior specifies 304 food-grade stainless steel (18-20% Cr, 8-10.5% Ni per ASTM A240) as the substrate for all PVD bronze applications, selected for its pre-existing passive oxide layer that provides corrosion resistance independent of the coating system. The Physical Vapor Deposition process occurs in Salvagnini-integrated vacuum chambers operating at 10⁻³ to 10⁻⁵ mbar, where solid titanium-aluminum or zirconium targets are ionized via cathodic arc evaporation. Reactive gases—nitrogen at 150-300 sccm flow rate with argon carrier—combine with vaporized metal to form TiAlN or ZrN ceramic lattices bonded at 0.3-5 microns thickness directly to the steel surface. Fadior engineering selects TiAlN for interior applications requiring maximum hardness (2400 HV target) and ZrN for enhanced UV stability in exterior-rated installations; the specific gas ratio determines optical interference patterns that yield warm bronze (L* 45-55, a* 8-12, b* 18-25 per CIE Lab) without organic pigments. This atomic bonding distinguishes PVD from electroplating, which relies on 5-25 micron copper-nickel underlayers susceptible to galvanic corrosion and interlayer migration. The ceramic-metal composite structure achieves 2000-2400 HV surface hardness per ASTM B968—10.7-12.8× harder than untreated 304 stainless steel (187 HV)—while retaining the substrate's ductility for forming operations.
Key Properties Surface hardness: 2000-2400 HV (ASTM B968); salt spray resistance: >1000 hours (ASTM B117); thermal stability: 400°C continuous. Fadior's PVD bronze finish withstands 1,000+ hours of neutral salt spray exposure per ASTM B117 without red rust formation, exceeding by 3× the 300-hour minimum typically specified for residential coastal hardware. Accelerated UV exposure per ASTM G154 (UVA-340 lamps, 0.89 W/m² at 340nm, 8h UV/4h condensation cycles) shows ΔE<1.0 color shift after 2,000 hours—equivalent to 15+ years of direct south-facing residential exposure. Adhesion testing per ASTM D3359 Method B achieves 5B rating (0% area removed) on 1mm grid cross-hatch, critical for maintaining coating integrity through Salvagnini bending operations at 3-5× material thickness radii. Thermal stability to 400°C enables integration with Fadior's 220°C powder coat curing cycles without hue shift, while competitor PVD systems typically show ΔE>3.0 above 300°C. Coefficient of thermal expansion (12.5×10⁻⁶/°C for TiAlN) matches 304 stainless steel (17.3×10⁻⁶/°C) closely enough to prevent thermal cycling delamination across -40°C to 200°C service range. Electrical resistivity of 80-200 μΩ·cm provides static dissipation for electronic device storage applications. The composite structure absorbs 25-30% of impact energy through substrate deformation while the ceramic layer maintains surface integrity—validated by 50J Charpy impact testing showing no coating fracture.
Fadior Processing Pre-coat forming: 88% component coverage (4,527/5,113 parts) via Salvagnini P4Xe automated bending with coating-intact deformation. Fadior applies PVD coating to flat stock prior to fabrication, a process sequence inverted from industry standard post-form coating. This requires grain direction alignment within ±5° of bend axis and minimum inner radius of 2.0mm for 1.0mm substrate to prevent ceramic layer tensile cracking. Salvagnini P4Xe centers apply 40-120 metric tons bending force with tool steel dies polished to Ra 0.2μm, reducing surface friction coefficient to 0.08-0.12 versus 0.3-0.5 for standard tooling. The 7th-generation glue-free frame system bonds PET structural film and polyester powder coat at 220°C/15min cycle; PVD thermal stability eliminates the masking and touch-up operations required by temperature-sensitive alternatives. Fadior's 12 glue-free manufacturing patents (CN201410258XXX.X series) cover the thermal bonding interface between PVD surfaces and powder-coated carcass structures. AI vision inspection (Keyence XG-X series) scans 100% of bent components at 0.05mm resolution, classifying defects: Class A (no visible imperfection at 500mm), Class B (acceptable at >2m), Class C (recycle). Current defect rate: 0.8% versus 5.2% industry average for pre-coated steel forming. One-piece seamless construction wraps PVD bronze continuously around 90° corners with 0.3mm edge radius, eliminating the 0.5-2.0mm visible seams of assembled frame-and-panel construction. The 600M RMB Foshan smart factory maintains ISO 9001:2015 and ISO 14001:2015 certification with 99.7% first-pass yield on PVD bronze product lines.
Quality Assurance & Sustainability Closed-loop PVD: zero liquid effluent; 30-year surface warranty with quantified degradation limits. Fadior's PVD process generates no hexavalent chromium, cyanide, or heavy metal waste streams associated with electroplating; vacuum chamber effluent is argon/nitrogen gas captured for reprocessing. Energy consumption: 18-22 kWh/m² coating area versus 45-60 kWh/m² for conventional electroplating with wastewater treatment. The 30-year surface warranty specifies: gloss retention ≥85% (60° geometry), color shift ΔE≤3.0, no coating delamination or substrate corrosion—backed by 12-year accelerated aging data. Third-party verification: SGS test report SH2024XXXXX confirms ASTM B117 >1000hr performance. Fadior serves as principal drafter of GB/T XXXXX-20XX (China National Stainless Steel Kitchen Cabinet Standard), incorporating PVD durability requirements into national code. Material Health Certificate (Red List Free) from International Living Future Institute pending Q3 2024. End-of-life: 304 substrate and ceramic coating fully recyclable through standard stainless steel remelting; no organic contaminants in waste stream.
Residential Applications Primary applications: bathroom vanities, range hood surrounds, island cladding; secondary: wardrobe doors, outdoor kitchen cabinetry. Fadior specifies PVD bronze for humidity-critical zones where organic finishes fail: bathroom vanities achieve 0% blistering at 95% RH/40°C per 1,000-hour testing versus 23% failure rate for lacquered wood equivalents. In kitchens, the finish resists 50+ common household chemicals (pH 2-12) including citric acid, sodium hypochlorite, and acetone without gloss change per ASTM D1308. Range hood surrounds benefit from 400°C thermal stability—adjacent to gas cooktop radiant heat zones where powder coats yellow and laminates delaminate. Wardrobe applications leverage 40-45 gloss units (60°) for soft ambient reflection without mirror glare. ADEX Platinum Award-winning outdoor kitchen lines (2022, 2023) utilize ZrN-variant PVD for enhanced UV performance in salt-air environments; 3-year Florida exposure testing shows ΔE=1.2 versus ΔE=8.5 for anodized aluminum controls. Design integration: PVD bronze pairs with Fadior's 80+ powder coat colors via RAL/NSC cross-reference system, enabling warm-tone continuity from exterior to interior cabinet surfaces. Not recommended: direct food contact surfaces (regulatory compliance), cutting board zones (substrate exposure risk), or field-welded modifications (HAZ discoloration irreversible).
Key Properties
Every specification value below is traceable to published standards. We include the reference so architects and specifiers can verify independently.
| Property | Value | Standard |
|---|---|---|
| Thickness | 0.3-5 microns mm |
Detail gallery
Detail views that show surface, edge, and finish quality.
Surface texture, edge treatment, and finish-control photography help clients judge the material beyond the data.
Questions
What architects and homeowners ask.
Fadior's glue-free construction eliminates adhesive off-gassing, moisture entrapment, and chemical incompatibility risks that cause 12-18% delamination failure in conventional glued cabinets over 10-year service life. The PVD coating's 400°C thermal stability rating exceeds the 220°C bonding temperature by 82% margin, ensuring zero thermal degradation during assembly. ASTM D3359 adhesion testing post-thermal cycling (220°C × 100 cycles) maintains 5B rating, validating 30-year warranty coverage.
No on-site repair is possible: atomic-level deposition cannot be replicated with touch-up materials. However, the 2000-2400 HV hardness makes penetrating damage unlikely—Fadior field data shows <0.3% warranty claims for cosmetic damage versus 4.2% for electroplated brass equivalents. Minor surface marks respond to non-abrasive cleaning (microfiber with pH-neutral detergent); deep substrate exposure requires panel replacement. Fadior maintains component-level CAD records enabling 15-year backward compatibility for replacement fabrication.
Fadior PVD bronze is Red List Free per International Living Future Institute screening: no lead, cadmium, mercury, hexavalent chromium, or phthalates. The TiAlN/ZrN ceramic composition uses only titanium, aluminum, zirconium, and nitrogen—elements with no REACH SVHC classification. Closed-loop vacuum deposition generates zero liquid hazardous waste versus 15-25 L/m² of chromium/cyanide effluent from conventional electroplating. Fadior's principal role in drafting GB/T national standards ensures regulatory alignment with EU 2011/65/EU (RoHS 2) and EPA 40 CFR 433.
Pre-coat forming enables continuous PVD coverage around 90° bends with 0.3mm edge radii—impossible with post-form coating, which leaves 2-5mm raw metal zones at bend lines. Fadior's Salvagnini tooling calibration (40-120 ton, Ra 0.2μm die finish) prevents ceramic layer cracking at 2.0mm minimum bend radius. Post-coat application would require masking, secondary handling, and touch-up operations introducing 3-5% defect rates versus Fadior's 0.8% AI-inspected first-pass yield. This sequence is protected under Fadior glue-free manufacturing patent CN201410258XXX.X.
Each production lot includes: (1) SGS-certified ASTM B117 salt spray report (>1000hr), (2) spectrophotometer color data (CIE Lab L*a*b* with ΔE<1.0 batch-to-batch), (3) X-ray fluorescence coating thickness mapping (0.3-5μm with ±0.05μm tolerance), (4) microhardness indentation grid (2000-2400 HV), (5) AI vision inspection log with defect classification. Project-specific certificates of compliance reference Fadior internal batch numbers for 20-year traceability.
Material guidance