Atmospheric contamination affects molten weld metal during the welding process, leading to impurities and potential defects in the final product.
Atmospheric contamination of molten weld metal occurs as it travels across the arc gap and within the pool before it solidifies. This contamination happens due to interaction with the surrounding atmosphere, leading to impurities in the weld metal.
Particles in the air, such as refractory oxides or carbonaceous particles, can affect the weld metal's quality. The presence of these contaminants can result in weakened welds or defects in the final product.
To prevent atmospheric contamination, welders often work in controlled environments or use shielding gases to protect the molten metal during the welding process.
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