Coastal & humid
Jebel Ali, Dammam, Sohar — salt-laden air all year. Nanotec 3,000, NanoGeo or hot-dip galvanising; A4 stainless where the fixing is permanently wet.
Coatings
4,000 hours of salt spray, in a climate that asks for it.
Bright zinc gives up long before a Gulf roof or a coastal substation does. CISER's Nanotec programme is the part of its engineering that matters most here — ceramic-film and organometallic systems tested to ASTM B117 and DIN 50018, hexavalent-chromium free and compliant with RoHS and REACH.
Performance
How far each system goes
Hours to the first red corrosion — the point at which the steel itself, not the coating, has started to go. Every figure below is CISER's own published test result.
Figures published by CISER in its catalogue of coatings and the Nanotec 10K technical book.
The systems
What each one is for
| Zinc electroplate | General and protected applications; clear, blue, yellow or black passivation. |
|---|---|
| Hot-dip galvanised | Structural steelwork, towers and external assemblies with long design life. |
| Nanotec | Ceramic-film top coat. Base coat + 1 layer: 240 h to white corrosion, 2,000 h to red. White goods, automotive, aeronautics, civil construction. |
| Nanotec 3,000 | Zinc or zinc-alloy base with two sealant layers: 400 h white, 3,000 h+ red. Clear and black versions. |
| Nanotec Aluminium | Nanoparticles limit galvanic attack where the fastener meets aluminium. Two layers: 4,000 h to red corrosion. |
| NanoGeo | Organometallic coating with a harder protective film. NanoGeo + Nanotec layer: 4,000 h. Wind energy, automotive, civil construction. |
| NanoInox 410 | Organo-ceramic top coat with stainless microparticles — CISER rates it 70% beyond 410 stainless. 1,500 h to red corrosion. |
| Nanotec 10K | 1,500 h free of red corrosion to ASTM B117 and 10 Kesternich cycles to DIN 50018. Hexavalent-chromium free, RoHS and REACH compliant. M6 / ¼″ upward. |
| Stainless & brass | A2 (304), A4 (316) and 410 stainless, plus brass, where the material itself is the corrosion answer. |
Selection
Choose by the exposure, not by the price list
Against aluminium
Solar rails, curtain wall, cladding. Nanotec Aluminium uses nanoparticles to limit the galvanic couple between fastener and frame.
Chemical & industrial
Plants, fertiliser handling, waste water. Nanotec 10K is built for chemical attack: 1,500 h to ASTM B117 and 10 Kesternich cycles.
Instead of stainless
NanoInox 410 carries stainless microparticles and is rated by CISER at 70% beyond 410 stainless — a cost step down in low to medium corrosion.
High-tensile parts
Zinc-flake and organometallic systems avoid the hydrogen embrittlement risk that electroplating carries on 10.9 and 12.9 fasteners.
Indoor & protected
Zinc electroplate with clear, blue, yellow or black passivation — the economical answer where the environment is dry.
Send us the environment, not just the part
Tell us where the fastener lives — coastal, indoor, buried, in contact with aluminium — and we will quote the coating that survives it.