Stainless steel telescopic door Wangwen meaning is not easy to rust steel, here "rust" is relative, not sure is relative to carbon steel.
不锈钢伸缩门望文生义即是不容易生锈的钢材所制，这儿的"不锈"是相对的，不是肯定的是相对于碳钢而言。
Stainless steel is not easy to rust, but not definitely not rust, but in the same conditions and environment, it is not easy to be corroded and rusted than carbon steel.
不锈钢不容易生锈，但不是肯定不生锈，只是在一样条件和环境中，较碳钢而言不容易被腐蚀和生锈。
"Rust" is really corrosion or called rust, because the appearance of steel and atmospheric oxygen, water and its acid, alkali, salt and other substances attack chemical or electrochemical effects caused by discoloration or corrosion called rust.
生锈"真实质是腐蚀或称之为锈蚀，是因为钢铁外表与大气中的氧、水分及其酸、碱、盐等物质发作化学效果或电化学效果而导致的变色或腐蚀称为锈蚀。
The substance produced on the surface is "rust," an oxide of iron, also known as the process of substance oxidation.
外表产生的物质是"锈"是铁的氧化物，也叫做物质氧化的进程。"
Why stainless steel retractable doors are not easy to rust, which has a direct relationship with chromium, and more than 12.5% of chromium is involved in the matrix.
不锈钢伸缩门为何不易生锈，这就和铬有着直接的关系了，在基体内参加12.5%以上的铬。
In oxidizing and incapacitating media, chromium can make the steel surface quickly form a fine passivation film to avoid damage to the metal matrix.
在氧化性腐败无能蚀介质中，铬能使钢外表很快地生成一层细密的钝化膜，避免金属基体被损坏。
