金属焊接-图11-钢筋焊接接头在达叻暴晒2年后的截面锈层形貌及平均厚度统计(a) 400E；(b) CE-1；(c) CE-2；其中1-母材；2-热影响区；3-焊缝

从图中可以看出，三个区域的锈层厚度基本一致，说明随暴晒时间，锈层厚度会逐渐趋于一致，整个焊接接头表面锈层厚度分布均匀。并且各区锈层的致密性基本相同，说明保护性基本一致。

Metal welding - Figure 11 - statistics of section rust layer morphology and average thickness of steel welded joint after 2 years' exposure to sunlight (a) 400e（ b) CE-1；( c) CE-2； Among them, 1-base metal; 2 - heat affected zone; 3-weld

It can be seen from the figure that the rust layer thickness of the three areas is basically the same, indicating that with the exposure time, the rust layer thickness will gradually become the same, and the rust layer thickness distribution on the whole welding joint surface is uniform. And the density of rust layer in each area is basically the same, indicating that the protection is basically the same.