FA Coat Non-Chrome 21 exhibits high corrosion resistance by forming a zinc-iron alloy film by coating with Z-Iron, which reacts with the silicate-based hybrid resin of BC Coat to form a passive film.
The composite film obtained by applying a fluororesin-containing fastener coat treatment to this is a chrome-free, non-polluting, thin-film surface treatment system that meets the requirements of "high corrosion resistance, torque stability, lubricity, and weather resistance.
FA Coat Non-Chrome 21 forms a dense, strong coating through a reaction between the metal (zinc)
and the hybrid oligomer of BC coat, which is made up of a silicate ester resin and a mechanical coat (Zn coat)
formed by projecting granular zinc-iron material, i.e., through the generation of chelates and a cross-linking reaction of the resin.
By applying a fastener coat to this, it meets the requirements for bolts, nuts and screws (high corrosion resistance, torque stability, lubricity and weather resistance).
Zn Coat is a mechanical plating process in which an iron-zinc alloy is projected at high speed
and pressure-bonded using the impact energy. Therefore, unlike conventional zinc plating,
no water treatment is required.
The formed film has very strong adhesion, and reacts with the BC Coat to provide dramatic rust prevention.
BC Coat is composed of a primer layer and a coating layer. In the primer layer, a chelate reaction occurs with the underlying Zn coating to form a non-conductive film, and a cross-linking reaction results in a rust-preventive film. In the coating layer, the silica in the primer layer reacts and cross-links to form a dense three-dimensional cross-linked structure, protecting the primer layer.
For the final treatment of FA Coat, we select the treatment liquid and paint that will give the performance
required by the customer, and the standard specification for FA Coat is [Fastcoat AM-4S(N)].
Fastcoat AM-3S(N) is a black lubricant that contains tetrafluoroethylene as a solid lubricant
and is bound to organic resins (melamine, polyester, etc.), and has been used for many years on bolts
and other parts of automobiles that are used under the harsh conditions of use.
| High Corrosion Resistance | High Lubricity |
|---|---|
Salt spray test: 3,000 hours Excellent weather resistance (SWM: 500 hours) Excellent chemical, solvent and oil resistance |
Low coefficient of friction Wear resistance, load resistance |
| Impact on Materials | Environmental Response |
|---|---|
No hydrogen embrittlement Thin film (7-15μ) so no effect on dimensional accuracy No embrittlement or thermal fatigue due to firing |
Compliant with RoHS and ELV regulations PFOA(S)-free Compliant with REACH regulations |
| No liquid accumulation |
|---|
Eliminates accumulation of fluid in Torx and cross recesses |
Salt spray test
Appearance photo (0 hour later)
Appearance photo (3000 hours later)
Torque shaft characteristics
Test item: M8 x 50 x 30 7T, flange bolt
Processing: Fastener coat AM-3S (N)
Coating thickness: 8 microns
