防止银、铜及其合金制品的变色锈蚀,在国民经济中有重要意义。它的直接效果是维持制品外观、艺术价值;保证产品质量(精度、机械性能等);有利于半成品的再加工;延长制品的贮存期限,提高保管质量;节约返修费用,提高成品率;增加商品的交换价值和销售机会;延长制品使用寿命,扩大制品的应用形式与范围;免除因变色锈蚀带来的种种间接损失。这些方面的效果,对于提高生产的经济效益是相当有价值的。与此同时,将间接地减少铜及其合金的损耗,节约了贵重的有色金属。防止银、铜及其合金的变色锈蚀不仅在工业部门中的意义是显而易见的,而且从目前市场和人们生活日益提高的日常事例来看,也同样是有意义的。比如,我们可以看 Preventing discoloration and rusting of silver, copper and their alloy products is of great significance in the national economy. Its direct effect is to maintain the appearance of products, artistic value; ensure product quality (precision, mechanical properties, etc.); is conducive to the re-processing of semi-finished products; extend the shelf life of products and improve storage quality; save repair costs and improve the yield; The exchange value and sales opportunities; extend the service life of products, expand the application of the form and scope of products; to avoid all the indirect losses caused by discoloration rust. The effectiveness of these aspects is quite valuable for improving the economic benefits of production. At the same time, copper and its alloys will be indirectly reduced loss, saving precious non-ferrous metals. The prevention of discoloration and tarnishing of silver, copper and their alloys is not only obvious in the industrial sector, but it also makes sense from the day-to-day stories of the current market and the increasing life of the people. For example, we can see