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With the increase of annealing temperature and holding time the corrosion potential (EC) increase and the corrosion rate (iC) decrease at the beginning of seawater immersion. However, with the increase of annealing temperature and holding time the EC initially increase and then decrease, the iC initially decrease and then increase after 15 days seawater immersion.

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As annealing temperature and holding time increase,  corrosion potential (EC) increase and  corrosion rate (iC) decrease at the beginning of seawater immersion. But after 15 days seawater immersion, as annealing temperature and holding time increase, EC firstly increases and then decreases, on the contrary,  iC firstly decreases and then increases.
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