Weld wetting phenomenon in stainless steel storage tanks
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This post was last edited by zhangwp999 on 2019-8-21 at 13:25. I would like to ask the experts: After welding a stainless steel storage tank and conducting a water filling pressure test, the weld areas remain wet while other parts are dry. The welder told me that this phenomenon is known as wetting. My questions are: 1. What is the professional term for this phenomenon? 2. Why does this phenomenon occur?
It’s not groundwater; for example, if the temperature is low, the whole thing will sweat.
The wetting phenomenon of stainless steel tank welds refers to the process during welding in which the molten filler metal or weld metal spreads over the surface of the base material to form a strong bond. This phenomenon directly affects the quality, sealing performance, and corrosion resistance of the weld. The following is a detailed analysis of this phenomenon: 1. Principle of wetting phenomenon. Wetting property: The ability of molten metal to spread on the surface of the base material depends on surface tension, the cleanliness of the base material, and welding process parameters. Contact angle: A good indication of good wetting is a low contact angle between the molten metal and the base material (usually