The corrosion of poor Cu area is the root of intergranular corrosion.

贫铜区受到腐蚀是晶间腐蚀的根源。

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Study area, secondary porosity is more developed in the research, including molded holes, intergranular dissolution pores and intergranular dissolution pores;

研究区次生溶蚀孔隙在研较为发育，包括各种铸模孔、间溶孔和粒间溶孔；

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Study area, secondary porosity is more developed in the research, including molded holes, intergranular dissolution pores and intergranular dissolution pores;

研究区次生溶蚀孔隙在研较为发育，包括各种铸模孔、间溶孔和粒间溶孔；

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