Corrosion Resistance and Corrosion Characteristics of TA10/6061 Explosive Welding Composite Pipes
In order to explore the corrosion resistance and corrosion characteristics of the titanium/alu-minum explosive welding composites in seawater environment,this study took the titanium/aluminum ex-plosive welding composite pipes as the research object,and carried out simulated seawater corrosion tests and electrochemical corrosion tests under multiple cycles.The scanning electron microscopy and electron backscatter diffraction(EBSD)were used to characterize the microscopic and grain changes of the samples before and after corrosion.The mechanical properties were evaluated by tensile test and hardness test.The results show that the surface corrosion products produced by the titanium/aluminum composite mate-rial hinder the subsequent corrosion process,and the corrosion resistance of the composite material in the periodic corrosion process is continuously improved.The intergranular corrosion occurs on the aluminum side of the composite interface at the initial stage of corrosion,and the interface performance decreases.Subsequently,it shows fine grain strengthening characteristics,which enhances the interface corrosion re-sistance.The corrosion effect makes the macroscopic mechanical properties of the composites decrease slight-ly,and the strength attenuation degree decreases with the corrosion time,but the hardness at the material interface is obviously reduced.The corrosion resistance of titanium/aluminum explosive welding composite is higher than that of aluminum matrix,weaker than that of titanium matrix,and has good corrosion resistance in general.
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