另外，在SEH和SE樣品之間進行比較，儘管SE樣品的腐蝕面積高於SEH

In addition, comparing between SEH and SE samples, although the corrosion area of ​​SE samples is higher than that of SEH samples, they are all rated as 5 in terms of corrosion area level. On the other hand, in terms of the number of corrosion points, SE is less than SEH. The results show that, compared with the SE samples, the SEH samples are more likely to suffer direct corrosion attack and pitting corrosion. This is consistent with the EIS measurement results, where the corrosion resistance of the SE sample is higher than that of the SEH sample, which may be related to the fact that SEH has more large pores in the microstructure.

In addition, when comparing SEH and SE samples, SE samples are rated 5 in terms of corrosion area levels, although the corrosion area of SE samples is higher than that of SEH samples. On the other hand, SE is less than SEH in terms of the number of corrosion points. The results show that SEH samples are more likely to be subjected to direct corrosion attack and pitting than SE samples. This is consistent with EIS measurements, where the SE sample is more corrosion resistant than the SEH sample, which may be related to the fact that SEH has more large pores in the microstructure.

In addition, in comparison between sEH and Se samples, although the corrosion area of Se samples is higher than that of sEH samples, they are all rated as 5 in terms of corrosion area level. On the other hand, se is less than sEH in terms of the number of corrosion spots. The results show that compared with Se samples, sEH samples are more likely to suffer from direct corrosion attack and pitting corrosion. The corrosion resistance of se is higher than that of sEH, which may be related to more macropores in the microstructure of sEH.<br>