Innozinc
SST 720–1,000 hr
Ceramic Galvanizing combining corrosion resistance with post-plating formability.
Innozinc FeaturesINNOZINC-H · HIGH CORROSION RESISTANCE
Where higher corrosion
resistance is required.
Innozinc-h is high-corrosion-resistance Ceramic Galvanizing for components and steel structures in saline and humid environments. Its representative SST specification of 1,500–2,000 hr supports corrosion protection for structures and their joints.
CORROSION RESISTANCE
Salt Spray Test · SST
1,500–2,000 hr
Innozinc-h: SST 1,500–2,000 hr. Standard Innozinc: SST 720–1,000 hr.
View Standard InnozincRepresentative SST specification: 1,500–2,000 hr. The specification includes plating thickness, substrate, pretreatment and white- and red-rust acceptance criteria.
PERFORMANCE
Key Performance Characteristics
Corrosion resistance, adhesion and formability support the specification of Innozinc-h for industrial components.
1,500–2,000 hr
Salt spray corrosion resistance
ASTM B117 / KS D 9502
ASTM B117 / KS D 9502
80 cycles
Cyclic corrosion test · CCT
JIS H 8502
JIS H 8502
8 µm
Average coating thickness
9H
Pencil hardness
ASTM D3363
ASTM D3363
5B · 3 MPa
Adhesion
ASTM D3359 · ISO 20340
ASTM D3359 · ISO 20340
The performance table presents results alongside their test methods. We define detailed specifications for the substrate, part geometry and service environment.
FABRICATION & ASSEMBLY
Corrosion protection and fabrication.
Specified for your components.
Welding, bending, threaded assembly and topcoating are integral to the surface-treatment specification.
Post-Plating Welding
- Thin composite plating supports post-plating welding, with welding parameters and post-treatment specified for each joint design.
- Radiographic testing of welds in four plated specimens found no defects.
- Reduced weld spatter and fume generation support improved working conditions and production efficiency.
Post-Plating Fabrication and Assembly
- Thin plating limits changes in thread pitch diameter, with assembly quality controlled to thread tolerances and gauge requirements.
- Post-plating forming capability: the evaluated specimen retained its surface condition without coating damage after a 90° bend.
- Topcoat adhesion exceeds the 3 MPa acceptance criterion stated in the ISO 20340 evaluation.
We incorporate welding, forming and fastening requirements into the product specification. Sample evaluation establishes quality-control and post-treatment conditions for fabricated areas.
View the Coating-Thickness Comparison
Coating cross-section — average 8 µm
Coating schematic: an average 8 µm zinc–ceramic composite layer on steel, compared at the same scale with a hot-dip galvanized coating of 50 µm or more.
Innozinc brand coating-structure schematic
APPLICATION CONDITIONS
Surface Treatment Designed for Service Conditions
Salt, condensation and dissimilar-metal contacts inform the coating and joint specification. We connect corrosion-performance requirements with joint design to improve component protection.
Fabricated and Damaged Areas of Conventional Hot-Dip Galvanized Coatings
- Zinc provides sacrificial protection; aggressive environments can accelerate its consumption.
- Hot-dip processing can involve thickness variation and challenges in achieving uniform coverage at edges, welds and complex features.
- Cutting, fabrication or welding damage can reduce local corrosion protection.
- Reliance on field repair of damaged areas can add rework and maintenance costs.
SUS304 and Galvanic Corrosion
- SUS304 offers good corrosion resistance. Electrical contact with carbon steel or galvanized steel in the presence of an electrolyte can lead to galvanic corrosion .
- The less noble metal acts as the anode and corrodes preferentially; carbon steel is the sacrificial member when coupled with stainless steel.
- Larger potential differences and greater electrolyte availability, including coastal, marine and condensation exposure, can accelerate corrosion.
- An unfavorable area ratio—a small anode and large cathode—concentrates corrosion on the anode.
Zinc Whiskers — SEM Observation
Scanning electron microscopy (SEM) shows needle-like zinc whiskers growing from a zinc-plated surface. Detached conductive crystals can cause short circuits in electrical and electronic equipment, making whisker control relevant to data centers and electrical installations.
Example of Black Staining
Dark staining on a zinc-plated surface illustrates changes associated with repeated moisture, condensation and salt exposure. Surface-quality management addresses both discoloration and corrosion protection.
Images: SEM observation of zinc whiskers and examples of black staining on zinc-coated surfaces. KEMP develops Innozinc-h application specifications for the metal pairing and service environment of each joint.
APPLICATIONS
Applications Requiring High Corrosion Resistance
Applications include components and structures exposed to seawater, salt and condensation, with demanding fabrication and assembly requirements. Plating specifications are tailored to customer requirements.
Shipbuilding & Marine
Frequent seawater, salt and condensation exposure, often with dissimilar-metal joints.
- Steel ship outfitting and cable trays
- Open grating, locking brackets, rods and supports
- Door handles, bolts and container components
Construction & Infrastructure
Exposed steel structures and dissimilar-metal contacts. Selection at the design stage is important where later rework is difficult.
- Anchors, brackets and connection hardware
- Welded hardware, pipe fittings and piping
Road Infrastructure
Road installations requiring long-term outdoor durability.
- Road grating and guardrails
- Rockfall-protection posts, bolts, nuts and hinges
Solar Structures
Corrosion protection for structures with long-term outdoor exposure.
- Utility-scale and ground-mounted frames
- Solar mounting bolts and nuts
Automotive
Components requiring both corrosion resistance and fabrication or assembly compatibility.
- Caliper bodies and support brackets
- Other automotive components
Metal Fabrication & General Industry
Surface-treatment specifications integrate cutting, welding and forming requirements with coating integrity and corrosion protection.
- General industrial bolts and nuts
- Hardware requiring welding or fastening
Data Centers
Environments requiring management of galvanic corrosion at stainless-steel bolt contacts and conductive debris such as zinc whiskers.
- Cable trays, mesh trays and server-rack frames
- Seismic supports, hangers, threaded rods and anchors
TEST RESULTS
Performance Results and Test Methods
Corrosion-resistance, adhesion and fabrication results are presented with their test methods. Detailed specifications follow the relevant grade and specimen conditions.
| Test item | Result | Test method |
|---|---|---|
| Salt spray test (SST) | 1,500–2,000 hr | ASTM B117 / KS D 9502 |
| Cyclic corrosion test (CCT) | 80 cycles | JIS H 8502 |
| Adhesion | 5B | ASTM D3359-17 |
| Topcoat adhesion | 3 MPa or higher | ISO 20340 Paints and varnishes |
| Weldability | No defects | Radiographic Test (RT) |
| Pencil hardness | 9H | ASTM D3363-05 |
| 26 hazardous VOCs in the solution | Not detected | KS M ISO 11890-2:2014 (GC/FID) |
| Solution — RoHS assessment | Not detected | IEC 62321-6 Ed. 1.0 : 2015 |
Test conditions and acceptance criteria follow the relevant technical data. VOC and RoHS results refer to the substances analyzed and their respective detection limits.
ONE BRAND, TWO PRODUCTS
Standard and high-corrosion-resistance grades.
Matched to your requirements.
Standard and high-corrosion-resistance grades address different corrosion-performance requirements and manufacturing processes.
Innozinc-h
SST 1,500–2,000 hr
High-corrosion-resistance Ceramic Galvanizing for demanding industrial components.
You are viewing this productCorrosion Resistance
Specify corrosion performance using SST, plating thickness, white- and red-rust acceptance criteria, substrate and pretreatment.
Fabrication & Assembly
Incorporate welding, bending, thread tolerances and dissimilar-metal joint conditions into the component specification.
Overall Cost
Evaluate total process economics, including consumables, inspection, repair and maintenance requirements.
NEXT STEP
Specify high-corrosion-resistance plating
for your components.
Share the substrate, geometry, drawings and service environment. We develop the plating specification around the required standard and post-plating fabrication conditions.