不锈钢通风管道出现生锈的原因有哪些呢？其具体的表现，一般来讲有以下几种情况，分别为：
What are the reasons for stainless steel ventilation pipes rusting? Generally speaking, there are several specific manifestations, including:
表现一：不锈钢通风管道表层出现一些缺陷难点，比如擦毛、脏污等。
Performance 1: There are some defects and difficulties on the surface of stainless steel ventilation pipes, such as scratches, dirt, etc.
表层二：在电焊焊接表层，其色彩是呈黑灰色的，或者是有黄点或黑斑。
Surface 2: In the welding surface, the color is black gray, or there are yellow spots or black spots.
表层三：不锈钢通风管道的一部分出现锈蚀。
Surface layer three: A part of the stainless steel ventilation duct has rusted.
这三种情况，其浸蚀水准是越来越严重，一旦出现该难点的话，则会降低其耐腐蚀能力，降低其使用寿命。对于通风系统来讲，则会降低其气密性检测，因而它的损害是不容小觑的。
These three situations have increasingly severe corrosion levels, and once this difficulty occurs, it will reduce their corrosion resistance and service life. For the ventilation system, it will reduce its airtightness detection, so its damage cannot be underestimated.
不锈钢通风管道出现浸蚀，其原因，一般有下述这类原因：
The corrosion of stainless steel ventilation pipes is generally caused by the following reasons:
(1)不锈钢通风管道所运用的板材，其切料或生产制造具体做法不当。
(1) The cutting or manufacturing practices of the plates used in stainless steel ventilation ducts are inappropriate.
(2)不锈钢通风管道在生产制造生产加工整个过程中，就出现了浸蚀状况，但并没有马上进行处理。
(2) During the entire production and processing of stainless steel ventilation pipes, corrosion occurred, but it was not immediately treated.
(3)不锈钢通风管道的焊接工艺没有选择适当，也就是焊接工艺不当。
(3) The welding process for stainless steel ventilation pipes was not properly selected, which means that the welding process is improper.
(4)不锈钢通风管道电弧焊接电焊焊接好以后，没有马上进行清除和消除，就进行过后解决了。
(4) After the arc welding of stainless steel ventilation pipes was completed, it was not immediately removed and eliminated, but was resolved afterwards.