Why Do Gray-black Spots Appear On The Tee Elbows In Stainless Steel Pipe Fittings

Stainless steel pipe fittings include common elbows, Stainless Steel Weld Tee, reducers, flanges, etc., which can be divided into socket fittings, butt-welded fittings, threaded fittings and flange fittings according to the connection method.

Why do many gray-black spots appear when ultrasonic cleaning agents are used to clean stainless steel pipe fittings? In fact, this is an oxidation reaction. The chloride ions in the strong oxidizing agent produce pitting on the surface of elbows and tees, forming gray-black spots visible to the naked eye. The specific situation depends on the state before cleaning to know the exact cause.

Therefore, when processing high-quality stainless steel pipe fittings, it is necessary to meet the requirements of all-round accuracy. Only in this way can standardized products be made. The accuracy of these products is reflected in various aspects: First, the dimensional standard meets the accuracy requirements, because there are many product standards, and different standards will be used in different environments; second, the production and manufacturing process and professional standards, so that it has professional standards and the product does not lose accuracy.