钝化依然是提高不锈钢零件基本防腐性能的关键一步。它可以让零部件具有满意的性能，也可以使它过早发生故障。如果操作不正确，钝化实际上会导致腐蚀。钝化是提高不锈钢合金工件固有防腐性能的一种后制作方法。它不是一种往氧化皮处理，也不像喷漆过程。在钝化不锈钢表面上存在一层保护性氧化膜。这层看不见的膜被以为是非常薄的，厚度小于0.0000001英寸，大约是人类头发丝的1/100,000。新加工、抛光或酸洗过的不锈钢零件，因接触大气中的氧气将自动获得该氧化膜。在理想的型线 流水槽模具 景观石 检查井钢模具 保定通风管道 隔离墩模具 保定保洁公司条件下，该保护性氧化膜会完全覆盖零件的所有表面。
Passivation
is still a key step in improving the basic anti-corrosion performance
of stainless steel parts. It can provide satisfactory performance for
components and also prevent premature failure. If the operation is not
correct, passivation can actually lead to corrosion. Passivation is a
post production method to improve the inherent corrosion resistance of
stainless steel alloy workpieces. It is not a process of treating oxide
skin, nor is it like a spray painting process. There is a protective
oxide film on the surface of passivated stainless steel. This invisible
membrane is considered very thin, with a thickness of less than
0.0000001 inches, approximately 1/100000 of human hair. Newly processed,
polished or pickled stainless steel parts will automatically obtain
this oxide film due to contact with oxygen in the atmosphere. Under
ideal conditions, this protective oxide film will completely cover all
surfaces of the part.
但是，在实际情况中，诸如车间灰尘或来自刀具的铁微粒等污染物，有可能在加工过程中被传送到不锈钢零件的表面上。假如这些异物粒子不往掉，则它们可能会降低原始保护膜的有效性。在加工过程中，有可能会从刀具上脱落微量的游离铁，并转移到不锈钢工件的表面上。在一定的条件下，零件的表面可能会出现一层薄薄的锈迹。这实际上是钢因刀具而不是母材产生的腐蚀。有时候，来自切削刀具或其腐蚀品夹进的钢微粒而产生的裂缝，可能会引起零件本身发生化学腐蚀性反应。含有铁的车间灰尘微粒有可能会粘附到零件表面上。尽管金属有可能以“加工好的状态”闪亮出现，但是看不见的游离铁微粒，在暴露到空气中后，有可能会导致表面发生锈蚀。
However,
in practical situations, pollutants such as workshop dust or iron
particles from cutting tools may be transported to the surface of
stainless steel parts during the machining process. If these foreign
particles do not fall, they may reduce the effectiveness of the original
protective film. During the machining process, it is possible to detach
a small amount of free iron from the tool and transfer it to the
surface of the stainless steel workpiece. Under certain conditions, a
thin layer of rust may appear on the surface of the part. This is
actually corrosion of steel caused by cutting tools rather than the base
material. Sometimes, cracks caused by steel particles trapped by
cutting tools or their corrosive products may cause chemical corrosion
reactions in the parts themselves. Workshop dust particles containing
iron may adhere to the surface of the parts. Although metals may appear
shiny in their 'processed state', invisible free iron particles may
cause surface corrosion when exposed to air.