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High corrosion resistant coating
With our long-term experience in coating technology, we have developed and have supplied an advanced surface treatment “FAcoat”, which provides high corrosion resistance as well as high lubricity over conventional coatings, since 1985, and it has been highly appreciated by a large number of customers.
As a result of our intensive approach for development of the chrome free coating technology which is in compliance with RoHS and ELV directives, we have succeeded in developing the newest environmentally friendly coating technology “non-Cr21 FAcoat (non-chrome21 FAcoat)” which is completely free from chrome, and have been put in market since 2006.
High corrosion resistant / high lubricity coating, in compliance with RoHS/
ELV directives
(I)Non-Cr21 FAcoat (NonCr-FA)
1) Summary
2) Characteristics
3) Process flow
(II) Zn coat + BC coat
1) Summary
2) Process flow
High corrosion resistant/ high lubricity coating
(I) FAcoat (CZ-FA)
1) Summary
2) Characteristics
3) Process flow
(II) Zn coat + C coat
1) Summary
2) Process flow
About RoHS and ELV directives
(I) RoHS directive
(II) ELV directive
Inquiry for high corrosion resistant coating :
Section in charge, Telephone No. FAX No. Address, E-mail address
High corrosion resistant / high lubricity coating, in compliance with RoHS/ ELV directives
(I)non-Cr21 FAcoat (commonly called as nonCr-FA)
1) Summary
Non-Cr21 FAcoat forms high-density and strong composite film layer on metal surface, composed of the mechanical coat by zinc-iron alloy grain shot (Zn coat) and its (zinc) reaction with hybrid oligomer in BC coat, consisting of silicate ester based resins, that is to say, chelate formation and cross-linking reaction of the resins.
Applying fluoroethylene coat over the film formed by Zn coat and BC coat, it satisfies all the characteristics of ‘high corrosion resistance’, ‘torque stability’, ‘lubricity’, ‘weather resistance’, required for bolts, nuts and screw products.
RoHS and ELV compliance
High corrosion resistant / high lubricity coating
Non-Cr21 FAcoat
2) Characteristics
① High corrosion resistance
・Over 2500 hours of salt spray test
・Over 500 hours of weathermeter resistance (good weather resistance)
・Good chemical, solvent and oil resistance
② High lubricity
・Low coefficient of friction
・Good wear resistance and load bearing capacity
③ Little effect on products/works
・No induction of hydrogen embrittlement
・Little influence on the dimensional accuracy, as thin film thickness (total film thickness 5~13μｍ)
④ RoHS and ELV compliance
・Completely chrome free (Neither hexavalent chrome nor trivalent chrome is included.)
・Pb(lead) and Cd(cadmium) concentration value is also in compliance with RoHS and ELV directives.
⑤ Same level of high corrosion resistance and high lubricity as conventional chrome-containing coating ‘FAcoat’ (commonly called as CZ-FA)
・Though anti-corrosion mechanism was renewed, by elimination of chrome from the system, same level of high corrosion resistance as conventional chrome-containing coating.
・Same level of high lubricity as conventional chrome-containing coating
Image of film structure
Fastnacote layer
Total film thickness 5~12μm Zn grain layer BC coat layer
Metal
3) Process flow
① Pretreatment : Degreasing
② Shot blast : Removal of scale, surface roughness control
③ Zn coat : Form a Zn layer by mechanical plating of Zn-Fe alloy
④ BC coat : Form a protection layer of Zn layer by 2 individual coatings
⑤ Curing : The layer formed by BC coat gets strong and stable by curing
⑥ Fastnacote : Apply dry film lubrication material??
⑦ Curing : The layer formed by Fastnacote gets strong and stable by curing
Products/Works ?Pretreatment ? Shot blast ? Zn coat ? BC coat ? Curing ? Fastnacote ? Curing ? Inspection
Mechanical coat (Mechanical plating)
Zn-Fe Alloy
Zn layer
Metal
(II) Zn coat + BC coat
1) Summary
It is the coating composed of Zn coat and BC coat only, simply eliminating the top coat (Fastnacote) from non-Cr21 FAcoat, suitable for the technical demand in which high lubricity is not required.
2) Process flow
① Pretreatment : Degreasing
② Shot blast : Removal of scale, surface roughness control
③ Zn coat : Form a Zn layer by mechanical plating of Zn-Fe alloy
④ BC coat : Form a protection layer of Zn layer by 2 individual coatings
⑤ Curing : The layer formed by BC coat gets strong and stable by curing
Products/works－Pretreatment ? Shot blast ? Zn coat ? BC coat ? Curing ? Inspection
Mechanical coat (Mechanical plating)
Zn-Fe Alloy
Zn layer
Metal
High corrosion resistance / high lubricity coating
(I) FAcoat (commonly called as CZ-FA)
1) Summary
The high corrosion resistance and high lubricity coating method which we have supplied since August, 1985.
Although it contains Cr(chrome), it provides remarkable performance. According to the recent trend of activity for the reduction of environmental effect, it is being substituted by the above mentioned non-Cr21 FAcoat.
2) Characteristics
① High corrosion resistance
・Over 2500 hours of salt spray test
・Over 500 hours of weathermeter resistance (good weather resistance)
・Good chemical, solvent and oil resistance
② High lubricity
・Low coefficient of friction
・Good wear resistance and load bearing capacity
③ Little effect on products/works
・No induction of hydrogen embrittlement
・Little influence on the dimensional accuracy, as thin film thickness (total film thickness 5~13μｍ)
3) Process flow
① Pretreatment : Degreasing
② Shot blast : Removal of scale, surface roughness control
③ Zn coat : Form a Zn layer by mechanical plating of Zn-Fe alloy
④ C coat : Form a protection layer of Zn layer
⑤ Curing : The layer formed by C coat gets strong and stable by curing
⑥ Fastnacote : Apply dry film lubrication material??
⑦ Curing : The layer formed by Fastnacote gets strong and stable by curing
(II) Zn coat + C coat
1) Summary
It is the coating composed of Zn coat and C coat only, simply eliminating the top coat (Fastnacote) from FAcoat (CZ-FA), suitable for the technical demand in which high lubricity is not required. This coating is being substituted by Zn coat + BC coat.
2) Process
Process flow is just the one eliminating Fastnacote and following curing from FAcoat’s process.
About RoHS and ELV directive
Since the late 1990s in Europe, 90% of the waste electrical and electronic equipment were burnt or landfilled without any treatment. Against the concern of the damage to human health in the next generation caused through food chain by efflux of hazardous substances like heavy metal in the soil, European countries (EU countries) have prepared for legal system.
RoHS and ELV directives are designed to preserve the global environment and human health through the life cycle of the products, namely from manufacturing to disposal.
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