Reasons And Prevention Methods For Pitting Corrosion Of Stainless Steel Cable Ties
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If there is pitting corrosion on the surface of Stainless Steel Cable Tie, it not only affects the appearance of the product, but also affects its use. The pitting corrosion commonly referred to in the industry is mainly manifested as pitting corrosion or pitting corrosion, which mainly occurs in specific corrosive media, especially in solutions containing halogen anions. What is the reason for this problem? What methods are there to prevent this problem?
Firstly, we need to understand the specific reasons for the pitting corrosion of stainless steel cable ties. When the medium contains active anions, it can lead to the formation of a passive film on the surface of stainless steel. The passivation film will damage the substrate, causing the metal inside to become activated. The passivation film is in a passive state, resulting in passive corrosion.
Because the anode area is smaller than the cathode area, the density generated by the anode current is high, causing the anode metal to corrode into small holes in a short period of time, resulting in pitting corrosion of stainless steel cable ties.
Secondly, let's take a closer look at another cause of cable tie pitting corrosion, which is that oxidizing metal ions (such as Fe ", Cu, and Hg) may also cause pitting corrosion. Under the action of O element and other oxidants in the solution, pitting corrosion occurs. The addition of molybdenum to stainless steel materials can improve the stability of the film, thereby forming a passivation on the surface of the stainless steel.
How can we prevent pitting corrosion on cable ties?
1. When selecting raw materials for production, choose austenitic stainless steel containing molybdenum and chromium elements.
2. The concentration of halide ions in the solution should be well controlled, and the concentration should be properly controlled to avoid situations where the concentration of the solution is different.
3. Reduce the temperature of the medium, as the higher the medium temperature, the more likely it is to cause significant pitting corrosion.
Of course, there are other methods to prevent pitting corrosion of stainless steel cable ties, but this requires us to constantly explore and observe in order to discover.
