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  • 储罐:不锈钢储罐为什么会出现腐蚀?
  • 本站编辑:杭州萧山升达防腐设备厂发布日期:2019.08.14

  不锈钢储罐无需经常清洗,水中的沉淀物质只需定期打开罐底的排污阀便可排出。但是我们会发现不锈钢储罐居然出现了腐蚀现象,这是怎么回事呢?下面带你一起来看看。

 
 
Stainless steel tanks do not need to be cleaned regularly. The sediment in the water can be discharged by opening the drainage valve at the bottom of the tank regularly. But we will find that stainless steel tanks actually appear corrosion phenomenon, what is this? Now let's show you around.
 
 
 
①缝隙腐蚀
 
Crevice corrosion
 
 
 
缝隙腐蚀或氧聚集电池腐蚀是当金属表面发生某种沉淀或附着物时,而产生的腐蚀。
 
Crevice corrosion or oxygen aggregation battery corrosion occurs when a precipitation or attachment occurs on the metal surface.
 
 
 
②浸蚀腐蚀
 
Erosion and corrosion
 
 
 
铜合金冷凝器的管子中可能会堵塞一块石头。此时,石头的下游方向将立即产生湍流。这将导致铜保护氧化膜的腐蚀或磨损,并暴露未保护的铜合金金属,导致进一步的腐蚀。
 
A stone may be blocked in the tube of a copper alloy condenser. At this point, the downstream direction of the rock will immediately generate turbulence. This will lead to corrosion or wear of copper protective oxide film and expose unprotected copper alloy metals, leading to further corrosion.
 
③点蚀
 
Pitting corrosion
 
 
 
通常由金属表面的缺陷引起。重复该反应并迅速产生金属穿孔现象。
 
It is usually caused by defects in the metal surface. Repeat the reaction and quickly produce metal perforation.
 
 
 
④电化学腐蚀
 
(4) electrochemical corrosion
 
 
 
当两种或更多种不同金属在导电液体电解质存在的条件下接触和连接时发生电化学腐蚀。
 
Electrochemical corrosion occurs when two or more different metals are contacted and connected in the presence of conductive liquid electrolytes.
 
 
 
除上述几点外,不锈钢储罐局部腐蚀的原因还包括剥落腐蚀、选择性浸出或脱合金成分腐蚀、晶间腐蚀、应力腐蚀开裂等情况,在实际应用中应予以重视。
 
In addition to the above points, the causes of local corrosion of stainless steel tanks include exfoliation corrosion, selective leaching or De-alloying component corrosion, intergranular corrosion, stress corrosion cracking and so on, which should be paid attention to in practical application.
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