1, stainless steel telescopic with other metal elements outside the table accumulated dust or heterogeneous metal granule of strong attachment in humid and warm environment, attachments and stainless steel liquid between the two, will become a weak battery, thus causing the electrochemical reaction, so that the film has been destroyed, we call it the electrochemical corrosion.

2、不锈钢伸缩门外表粘附着有机物汁液（如汤汁、唾液等），在有水氧情况下，构成有机酸，长时间则形成有机酸对金属表面的腐蚀。

2, stainless steel retractable door surface sticking organic juice (such as soup, saliva, etc.), in the presence of water and oxygen, constitute organic acids, long time to form organic acid corrosion on the metal surface.

3、在有污染的空气中（含有大量的硫化物、氧化物、氧化氢的大气），遇冷凝水，形成硝酸、醋酸液点，引起化学腐蚀。

3, in the polluted air (containing a large amount of sulfide, oxide, oxidation of hydrogen atmosphere), when the condensation water, the formation of nitric acid, acetic acid liquid point, causing chemical corrosion.

4、不锈钢伸缩门外表粘附含有酸、碱、盐类物质（如装修墙壁的碱水、石灰水喷测）引起局部腐蚀。

4, stainless steel telescopic door surface adhesion contains acid, alkali, salt substances (such as decoration wall caustic soda, lime water spray test) caused local corrosion.