en.Wedoany.com Report on Mar 23rd, Entering the production workshop of a precision copper strip enterprise in Xinxiang City, Henan Province, China, coils of copper strips are running smoothly at a maximum speed of 80 meters per minute, undergoing surface coating treatment in molten tin liquid. This is the physical hot-dip tinning technology proposed by Han Chen, a senior engineer at China Nonferrous Metal Technology Co., Ltd. It enables copper strips used in new energy vehicle connectors to achieve dual improvements in excellent performance and green production.
With the rapid development of the new energy vehicle and aerospace industries, the demand for precision strips such as copper alloys, bronze, and brass for high-end connectors continues to grow, imposing higher requirements on their electrical conductivity stability, corrosion resistance, and high-temperature resistance. Traditional chemical electroplating processes face issues such as high costs, difficulty in controlling coating quality, strict environmental restrictions, and significant equipment investment, limiting their development potential.
"Can we find a more environmentally friendly, efficient, and economical method to equip copper strips with high-performance 'protective clothing' while reducing the consumption of precious copper resources?" This question lingered in Han Chen's mind.
To solve this challenge, Han Chen and his team turned their attention to physical hot-dip tinning technology. The idea seems straightforward: first, melt the tin, then immerse the copper strip into the molten tin for coating. However, implementing this idea proved to be fraught with difficulties—how to ensure the tin layer adheres firmly and uniformly to the copper strip surface like armor? How to precisely control thickness and smoothness? How to guarantee production continuity?
After countless days and nights of research and deduction, the technical path gradually became clear.
The physical hot-dip tinning technology proposed by Han Chen fully utilizes the enterprise's existing acid-alkali cleaning equipment for pre-treatment and achieves continuous production through an integrated intelligent production line. The entire process essentially achieves zero discharge of production wastewater, making it green, environmentally friendly, stable, and efficient.
Currently, two production lines designed under Han Chen's supervision have been successfully put into operation and are running at full capacity, with another production line undergoing construction drawing design. Thanks to their excellent performance, related products have successfully entered the supply chains of several globally renowned connector companies. The added value per ton of tinned copper strips has increased by several thousand or even tens of thousands of yuan compared to ordinary bare strips, becoming a new profit growth point for the enterprise.
This innovation originating from the front line not only equips copper strips with a sturdy and durable green "tin armor," significantly improving product conductivity, corrosion resistance, and service life but also breaks the environmental constraints of traditional electroplating, achieving near-zero wastewater discharge. It provides a replicable and promotable path for the green transformation of the copper processing industry. China Nonferrous Metal Technology Co., Ltd. empowers the real economy with technological strength, driving the industrial chain toward high-end, green, and intelligent development, injecting sustained and robust innovation momentum into the high-quality development of China's manufacturing industry.
