The letters B and H in Table 2 indicate the time of immersion in the zinc bath, B being 3 minutes of immersion and H 7 minutes. The numbers 9, 8, 7, and 2 indicate the specimen number analysed. From Table 2 we can observe that the average number of cracks per unit of length is about 6/11 for HE360DR and 7/8 for S420MC. A first remark proves that the number of cracks increases with the time of immersion. Anyway, it seems that a single unit did not provide enough information. So the observation was extended on full length specimens consisting of 16 units. The results are plotted in Figure 3 and highlight the number of cracks for all 16 units of length. Figure 3 shows that the number of cracks on the entire length of zinc layer that encloses each unit is overall scattered; however, on the local case of two/three consecutive units, the number of cracks per unit seems to be almost uniformly distributed.
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