锈蚀给金属商品造成的损失是严重的。农机供应系统每年都要报废上亿元的商品,相当一部分是因为保管保养不当,引起锈蚀所致。在这里介绍一点金属商品生锈的原因和防锈的知识,以提高大家做好防锈工作的自觉性。一、金属为什么会生锈金属在大气中,由于水分、氧气及其它杂质引起的腐蚀叫做生锈或锈蚀;金属锈蚀的内因则是金属本身的不稳定性和不均匀性。自然界的金属,大部分不能以纯净的状态存在,有和其它物质化合,以化合物状态存在的趋向,这就是金属的不稳定性。如铁就是以氧化铁、硫化铁、碳酸盐的状态存在于矿石中;铜、铝则是以氧化物的状态存在于矿石中。另外,金属的化学组成和物理状态 Corrosion caused to the loss of metal products is serious. Agricultural supply system scrapped hundreds of millions of yuan of goods each year, a considerable part of which is due to improper storage and maintenance, causing corrosion. Here to introduce a little rusty metal products and rust-proof knowledge, to improve everyone’s awareness of rust prevention work. First, the metal rusty metal In the atmosphere, due to moisture, oxygen and other impurities caused by corrosion is called rust or corrosion; metal corrosion is the inherent cause of the metal itself is not stable and uneven. Most of the metals in nature can not exist in a pure state. They have the tendency of compounding with other substances and existing in the state of compounds. This is the metal’s instability. Such as iron is the iron oxide, iron sulfide, carbonate state exists in the ore; copper, aluminum is based on the oxide state exists in the ore. In addition, the chemical composition and physical state of the metal