Abstract:
The synergism effect of
Thiobacillus ferrooxidans(T.f) and
Thiobacillus thiooxidans(T.t) on bio-etching metal material was studied. The rates of bio-etching copper, tin bronze, T10, 40Cr were analysed and compared while
T.f, T.t and the mixture of
T.f and
T.t was used separately. The maximal bio-etching rate of bio-etching above metals using the mixture of
T.f and
T.t is 3.4 times, 3.6 times, 2.5 times and 2.5 times than that of using
T.f alone, respectively. The bio-etching effect of
T.f can be enhanced by
T.t mixed under the condition that Fe
2+ ion and proper reductive sulphide exist, and the bio-etching rate is increased.
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