Stainless steel has only appeared for over 100 years, and its mechanical processing performance is not good, making it difficult to process compared to copper. Therefore, basically all previous faucets were made of "copper". However, pure copper has lower strength and is not suitable for making instruments with strength requirements. It is commonly used for wires. To improve the strength of copper, other metals need to be added to make copper alloys, which give rise to brass, bronze, and other materials. You can tell the obvious difference by comparing the copper wire of the single core copper wire with the shrapnel inside the socket. But copper is expensive, so some unscrupulous merchants use other materials instead, most of which are zinc alloys. That is to say, brass, which was originally made by adding zinc to copper, has become a zinc alloy made by adding copper to zinc. But zinc alloy will age and become brittle, and hinges made of zinc alloy used to break after a few years.
YIDA K&B Tech CO.,Ltd Source: Zhihu
