Scope of application-Non-Chromate Fasteners

Non-Chromate Fasteners

    PEACCO ENTERPRISE CORP. commits to the research and development on thetechnologies of surface treatment for metals, replacing the conventional chromic acid treatment with the patented environmentally friendly MGTEK Process. This new technology, even being applied on the most difficultly treated magnesium alloys, can still feature the superiority over other currently existing processes, and also surpass the performance referred in relevant research and studies in Europe, US, and Japan, thus, obtains many customers’ recognition and adoption. The recent application of this technology in the fastener industry is expected to remove the environmental concern over the surface treatment of fasteners.

    Peacco has put in a great deal of efforts in developing innovative technologies for improving the corrosion resistance of metals, by means of coating with organic and inorganic nano-materials. When this technology is applied in the field of plated screws, it can totally replace the chromate conversion coatings with greatly improved performance, in the meantime, it has superior than the non-chromate screw manufacturing process. That is currently existing in other countries.

    Peacco’s nano-tech coating materials can generate extremely strong chemical bond with metal surface, followed by manipulating the ingredients of the organic and inorganic compounds, to achieve functionality on metal surface for corrosion resistance, enhanced adhesion, high hardness, water-repellence, and anti-fingerprint, anti-sweat etc. Particularly for the purpose of corrosion resistance, the rust-prone metal surface is modified into an inert surface. In other words, the technology is an active corrosion preventive technology that has completely changed the properties of the metal surface, requiring no heavy metal ions such as hexavalent chromate for improving the performance of corrosion resistance, and thus imposing no hazard to the environment, therefore, being very environmental to the earth and life friendly.

    Peacco’s innovative anti-corrosion technology does not require any conversion treatment, by directly processed with about 3-5µｍ thin film of this organic and inorganic nano-material coating on 3~5µｍ galvanized screws , its corrosion resistance can be raised up to 400 hours or longer to red rust in salt spray testing, with the coating thickness adjustable for corrosion requirements of higher extents, to replace the thicker layers of galvanization that affect the thread specifications. The environmental friendly used materials in this process will bring benefits on the ecological environment, while the feature of excellent corrosion resistance can be flexibly adjusted to its thin film thickness, and the low cost will allow this anti-corrosion technology to be accepted by the industries.

The chromium screw:

    In the daily life and industrial used, the most common galvanized screw product such as blue or black metal screw, which is mature and inexpensive. It was the mainstream of the screw product, after galvanized process, the blue and black metal screw would be used on chromic acid treatment to do greet surface protection. But the chromic acid has caused the serious pollution to the environment, so that it has been controlled and prohibited for many years. Therefore, these products were experienced the elimination destiny, so the blue and black metal screw will face with the market of usage prohibition challenge in the future. First, it can not export to EU, then the other territory may have gearing effect. It’s the important issue which the galvanized screw manufacture must face now.

Peacco process: non-chromate screw

    Peacco adjust to the environmental protection trend, and invest the non-chromate screw surface treatment technology development positively. We integrate the metal galvanized process to develop the nontoxicity and better corrosion resistence screw. We hope that it could give the galvanized screw market one more choice, and enhance the galvanized screws competitive advantage. It can also agree with the 21st century humanity to the environment request.

The contrast for process:

Traditional: electroplating→degreasing → conversion coating → wash (need huge water) → dry by heat
Non-chromate: electroplating → degreasing → wash → coating→ dry to solidify (no need water)

The contrast for function: (the galvanization film 3-5μm)
Salt spray test (ASTM-B117-95)
　
․the generally blue screw ＜ 72hrs
․the galvanized metal screw (which used N7111) ＞ 300hrs
․the blue galvanized metal screw (which used N7111) ＞ 500hrs

Process Description:

Zinc-Plated Fasteners (without chromate treatment) → Dip with Peacco N6020R / N7113 Liquid (5-10 mins.) → Centrifuge → Baking @ 160oC, 10-15 mins. → Dip with Peacco Liquid again → Centrifuge again → Baking again → 2 to 3 times → Finish (Final cured thin film thickness of 3-5µm)

Specifications Comparison:

The contrast for cost: galvanizes for 400hrs

Screw / Fastener Nanoscale Film Coating Treatment Process

1.  Degreasing Stage

2.  Thin Film Coating Solution Stage

3.  We can design / manufacture full set of nanoscale thin film treatment equipment for the different customer’s request.