Why removal of spatter is important yet difficult/ detrimental by conventional methods? Problems Associated with Spatter.
Removal of spatters has always been the most important aspect of post weld operation. There are however a number of problems associated with the conventional methods of chipping and grinding. Some of the associated problems has been listed as under:
1. Incomplete penetration, undercut, pores, slag inclusions, weld spatter and arc strikes are typical examples of weld defects. These defects have negative effects on mechanical properties, resistance to local corrosion and make it difficult to maintain a clean surface.
2. In the case of stainless steel which is protected by a layer consisting mainly of chromium oxide, the surface defects leads to its removal and therefore corrosion. Therefore a fine surface finish is crucial to corrosion resistance.
3. Grinding or blasting too heavily will result in rough surfaces. A rough surface collects deposits more easily, thereby increasing the risk of both corrosion and product contamination.
4. Heavy grinding also introduces high tensile stresses, which increase the risk of stress corrosion cracking and pitting corrosion. There is a maximum allowed surface roughness (Ra-value) for many applications, and manufacturing methods that result in rough surface.
5. Otherwise, pickling is the most common chemical procedure used to remove oxides and iron contamination. But the effectiveness of pickling also depends on the surface which must be free of organic contamination.The range of Spatter Cure products takes care of all these problems and gives a dense and clean weld with no post weld operations like chipping and grinding. Just wipe off the spatters with a wire brush or even a cloth, and you will get a shining, clean surface with a visibly perfect weld joint. To know more about Spatter Cure Products, click here.
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