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About Zindn
0510-85626800
Iteration of ZINDN
ZINDN Dual Protection Mechanism
ZINDN is one of the few existing anti-corrosion technologies that can achieve a combination of cathodic protection and barrier protection.
Cathodic Protection
The sacrificial anode is one of the important means of cathodic protection. The sacrificial anode method is used to achieve cathodic protection of steel. Zinc is a commonly used anode material in the sacrificial anode method. The standard electrode potential of zinc is -0.76V, which is more active than iron's -0.44V. When zinc is coated on steel substrate, zinc will be preferentially corroded and released electrons to flow to the steel, thereby protecting the steel substrate from corrosion. ZINDN uses ultra-pure ultra-fine zinc dust with special conductive fusion agent, which has more excellent cathodic protection performance.
Barrier Protection
The zinc layer exposed to the environment will gradually react with water and air in the environment over time to form stable basic zinc carbonate (commonly known as white rust). The corrosion product is filled between the zinc powder gaps, making ZINDN layer denser, and further blocks and shields the corrosion of corrosive media. ZINDN layer has a self-sealing function.
Advantages of ZINDN
Long-term Anticorrosion
Cathodic protection + barrier protection double protection, salt spray resistance can reach more than 5000h, and it can easily achieve long-term corrosion protection for more than 25 years;
Strong Adhesion
The developed fusion agent technology solves the adhesion problem of high zinc powder dust (96% zinc dust in dry film). A 4% mass fraction of fusion agent can firmly bond 24 times its own weight of zinc dust and combine the zinc dust with the substrate, with an adhesion of up to 5-10MPa.
Good Compatibility
ZINDN can be used as a single layer, or as a two-layer or three-layer system with sealer, topcoat, silver zinc rich, etc. to meet customers' needs for long-term protection and beautiful decoration.
No cracking and fall off of application on welding
ZINDN solves the industry headwind that galvanized paint are prone to cracking and falling off at welds, and the application quality is guaranteed;
Convenient Application
Single component, can be applied by rolling, brush, air spray, airless spray, no settlement, no gun clogging and pump clogging;
Cost-effective
Compared with hot-dip galvanizing and thermal spraying, ZINDN is Eco-friendly, low-cost and easy to maintain; Compared with epoxy zinc-rich, ZINDN provides long maintenance and recoating intervals and low anti-corrosion cost for steel structures throughout their life cycle.
ZINDN Experimental Performance Comparison
Experimental performance comparison
Experimental performance comparison
| Items | Hot-dip | Arc spraying zinc (aluminum) | ZINDN |
| Surface Treatment | Pickling and rinsing | Sa3 level | Sa2.5 level |
| Application Method | Hot dip | Arc spraying zinc; Oxygen; B block hot spraying zinc (aluminum) | Brush, roller, air spray, airless spray, dipping |
| Application Difficulty | Difficult | Difficult |
Easy |
| Onsite Application | Can't | Difficult with conditions |
Convenient and flexible |
| Energy Consumption | high | High |
Low |
| Efficiency | Depending on the scale of hot plating plant | 10m²/h by arc spray zinc; 50m²/h by arc spraying aluminum |
200-400 m²/h by airless spray gun |
| Environment and Safety | The plating solution produce a large amount of toxic substances, waste liquid and gas | Produce serious zinc fog, dust, cause occupational disease | Free of lead, cadmium, benzene, etc. Application is the same as painting, and serious pollution is avoided. |
| Touch up & Recoating | Can’t | Maintenance is difficult and can’t be recoated |
Easy |
On-site Application Effect
ZINDN Specification
Packages by tin
25kgs (9.25liter)/tin
10kgs (3.7liter)/tin
5kgs (1.85litre)/tin
2kgs (0.74liter)/tin
Aerosol spray (420ml)
ZINDN Spray ZD96-21
ZINDN ALU Spray ZD90-21
ALU Spray ZD18-16
ZINDN Protective Systems
Single layer system
Excellent protective performance
Cost-effective
Recommended film thickness: 80μm-120μm
Duplex system
ZINDN (80μm-100μm) +Silver metallic sealer (20μm-30μm)
ZINDN (80μm-100μm) +Silver zinc rich (30μm-40μm)
ZINDN(ZD96-4) (60μm-80μm) +Powder coating (60μm-80μm)
Triplex system
ZINDN (60μm-80μm) +ZD Sealer (80μm-100μm) +Polyurethane/Fluorocarbon/Polysiloxane topcoat ((60μm-80μm)
ZINDN On-site Application Effect Comparation
Before using ZINDN repair, the original steel structure had faded and powdered seriously
After using ZINDN repair, the steel structure is protected by ZINDN to form a protective barrier, effectively enhancing the service life.
ZINDN Applications Process
Degreasing and decontamination
Surface oil stains should be cleaned with low-pressure spray or soft brush with special cleaning agents, and all residues should be washed away with a fresh water gun, or treated with lye, flame, etc., and washed with fresh water to neutrality. Small areas of oily dirt can be scrubbed with solvents.
Surface treatment
Use sandblasting or power tools and hand tools to remove rust, protrusions and peeling parts on the surface, especially the rusted parts, and polish the rough parts through the weld to make them smooth.
Product preparation
ZINDN is a single component. After opening the barrel, use a power tool to stir the paint in the tin evenly. Stir for more than 3 minutes until there are no particles.
Add ZX-01 thinner at a ratio of 0-5% (by volume) to stir again. Due to different temperatures and spray pump pressures, the actual thinner is added based on the spray gun's ability to spray.
Application
By brush or roller, lint-free paint brush and roller core are recommended, and use the cross-cross method to apply the paint evenly to ensure good penetration of the paint, and pay attention to prevent sagging and unevenness.
By spray gun, a pump with a compression ratio of about 1:32, Z-type nozzle spray gun is recommended; During applications, keep spray width about 25cm, the nozzle perpendicular to the workpiece at 90°, the gun distance about 30cm. With 2 coats, after the first coat surface dry, spray the second coat, move the gun back and forth 2 times, and apply it to the specified film thickness required. Both the first and second coats are sprayed by repeated cross-cross method.
ZINDN project case
Ningbo Chunxiao Bridge
Protective system:
1. The outer surface of the steel structure: ZINDN 100μm + ZD sealer 120um + Fluorocarbon 80um;
2. The contact surface between steel beam and concrete, and the ladder inside the arch: ZINDN 80μm
Shanghai Disney Land
Protective system:
ZINDN 80μm
Wuxi Fengxiang Interchange
Protective system:
1. Outer surface of steel box girder: ZINDN 80μm + cold spray zinc sealant 100μm + fluorocarbon finish 80μm
The inner surface of steel box girder:ZINDN 90μm.
Steel bridge and concrete contact part: ZINDN: 90μm
2. Composite beam steel beam and ES ramp steel box beam:
The outer surface of steel box girder and outer diaphragm: epoxy zinc-rich 80μm, epoxy mica 120μm, polysiloxane topcoat 100μm;
The inner surface of the steel box girder, the inner diaphragm: epoxy zinc-rich 50μm, epoxy thick build paint 300μm
Zhejiang Guohua Ninghai Power Plant Phase II 2×1000MW Expansion Project
Protective system
ZINDN 80μm+ ZD sealer 80μm+polyurethane finish 70μm; ZINDN 80μm+ silver metallic sealer 20μm
Contact Us
Headquarters Tel:
Business Hotline:
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Address:
9/F, Wai Chuang Building, 999 Gaolang East Road, Binhu District, Wuxi
Public Security Record No. 32021102000961| Su (tin) dangerous chemical word 02802