In order to better control bacterial corrosion under scale,this paper studied the growth rate and corrosion of bacteria under scale under the condition of initial bacterial content.The experimental results showed that when the initial bacterial content was less than 2,000/mL,the bacterial content continued to increase significantly with the increase of the initial bacterial content,but the bacterial content under the scale was always at a low concentration level.When the initial bacterial content was more than 2,000/mL,the subscale bacterial content increased sharply.For carbon steel,the bacteria corrosion under scale is mainly the local small hole corrosion damage.For 1Cr steel,when the bacterial concentration is low,the bacterial corrosion under scale is mainly the local small hole corrosion damage.In the case of high bacterial concentration,local small hole corrosion decreased.
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