The choice between “eco-friendly” and “quality” is a thing of the past.
The Fusion of Mechanical Zinc Plating and Cold-Headed Round Washers
In today’s landscape, where compliance with environmental regulations and long-term component reliability are simultaneously required, the combination of mechanical zinc plating and cold-headed round washers is attracting attention as a choice that balances practicality with environmental performance.
Reasons Why We Are Chosen
“Unwavering quality” achieved through a patented manufacturing process.
Round washers offering excellent dimensional accuracy, strength, and flatness, produced using a scrap-less manufacturing process.
⇒ Consistent quality.
The peace of mind provided by mechanical galvanizing
A surface treatment offering excellent corrosion resistance, freedom from hydrogen embrittlement, and reduced environmental impact.
⇒ Ideal for applications requiring safety and reliability.
A “smarter cost choice” than stainless steel.
Optimize material costs without compromising performance.
⇒ Ideal for re-evaluating components that were previously over-specified.

Primary uses
Construction and civil engineering components
Industrial machinery and equipment parts
Transportation equipment-related parts
Infrastructure-related components
Various fastening components
Exclusive Importer for Japan:Archer Company
https://archer-company.com/en/st-products-6/
An eco-friendly choice. Towards a sustainable future.
Mechanical plating developed as an alternative to hot-dip galvanizing.
Compared to hot-dip galvanizing, mechanical plating generates only one-third of the CO2 emissions.
| Mechanical galvanizing | Hot-dip galvanizing | |
| 写真 | ![]() | ![]() |
| CO2排出量Kg CO2 e/kg | 0.08 | 0.24 |
| 使用薬剤 | 亜鉛粉末と水のみ | 蒸留亜鉛地金1種以上使用 亜鉛浴温度は430~470℃に 加熱されているためCO2が発生する。 |
| メッキ後の廃水 | 再利用可 | 法規制に基づき、 河川、下水道などに排水する。 再利用は不可。 |
Mechanical galvanizing achieves CO2 emissions approximately 70% lower than those of hot-dip galvanizing.
| Mechanical galvanizing | Hot-dip galvanizing | |
| Corrosion resistance | Environmentally friendly, with durability equal to or better than hot-dip galvanizing. | Good results can be expected under favorable environmental conditions, but the service life is significantly shortened in areas such as coastal regions. |
| Exterior | Beautiful, with a uniform surface finish. | The surface has significant irregularities. |
| Concerns about embrittlement | No hydrogen embrittlement due to room-temperature processing. | There are concerns regarding embrittlement due to hydrogen embrittlement in heat-treated products. |
| Environmental resistance | Lead-free and RoHS compliant Environmentally friendly; requires no wastewater treatment. | Contains lead and cadmium; RoHS non-compliant. Wastewater treatment required for environmental protection. |

Recommended for customers with these c
・I want a product that offers both durability and good aesthetics.
・Conventional hot-dip galvanized products have issues with visual quality.
・I want to reduce costs associated with the long-term use and maintenance of parts.
・I am currently using hot-dip galvanized washers but am concerned about looseness at the bearing surface.
Mechanical zinc plating minimizes the risk of parts sticking together,
making it particularly suitable for washers and small components (such as flat parts).
We also offer mechanically zinc-plated products other than washers,
so please feel free to contact us!

