تأثير رواشح بكتريا (T.Thiooxidans )‎ على إحداث التآكل في فلزات الألمنيوم و النحاس و الزنك

الملخص EN

In this study we isolate some species of sulfur oxidizing bacteria from Iraqi soil and water that riches with sulfur compounds , these microorganisms were identified as strains of ( Thiobacillus thiooxidans , T.Thioparus , T.Thionovellus , T.ferrooxidans ) .

An isolated strain of Thiobacillus thiooxidans was grown at certain conditions that optimum for the growing such as temperature and PH-Nomber, as a liquid shaken culture.

The bacterial filtrate was isolated from the culture media that contain the growing bacteria for 6 weeks and then study the curve of bacterial growing in liquid metal salt media , and also study the effect of these filtrates of bacteria in activation the corrosion in the metals thin film of ( aluminum , cupper and Zinc) when we immersed these metals in the bacterial filtrate at temperature 28C 0 , for times ( 60 , 30 and 15 ) min.

respectively also we calculate the corrosion rate for all metal in conventional methods , and we found that the corrosion rate of Zinc meta larger than copper and aluminum and for copper larger than aluminum.