Abstract
The carbon steel/stainless steel composite pipe was prepared by centrifugal compound casting-hot extrusion-cold rolling. SEM was employed in detecting the microstructure and alloy element distribution maps in stainless steel of composite pipe. The mechanical properties were measured through tensile test. The corrosion resistance of the composite pipe was detected in acid, alkali and salt solutions. The results show that the outer and inner layers are integrated with good metallurgical behavior, and the mechanical properties of the composite pipe are satisfactory, the chemical compositions are well-distributed. The grain-boundary corrosion test is qualified. This composite pipe has better corrosion resistance in 10%H2SO4and 10%NaOH solution than in FeCl3solution at room temperature.
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