The Effect of Corrosion Inhibitors on Antimicrobial Activity of Biocide in Water-soluble Cutting Fluid

The effect of corrosion inhibitors on antimicrobial activity of biocides (Kathon 886 MW, Triadine 3, Triadine 10 and Grotan BK) was investigated using the Pseudomonas aeruginosa which frequency of occurrence in contaminated fluids is very high and its growth and survival is excellent. When a biocide was used with a corrosion inhibitor, the antimicrobial activity of it was affected by the corrosion inhibitor used. The antimicrobial activity of Kathon 886 MW increased when corrosion inhibitor (each of SS 510, MEA) was used. Triadine 3, Triadine 10, Grotan BK showed the similar trend of antimicrobial effect for the corrosion inhibitors used. Their antimicrobial activities increased when the corrosion inhibitor such as CP-105, CP-E-7 and MEA was used individually. The antimicrobial activity of each corrosion inhibitor was also compared. The results showed that CP-E-7 and MEA was bioresistant and the other corrosion inhibitors were biosupportive. The antimicrobial activity of biocides was in the order of Triadine 10 < Triadine 3 < Kathon 886 MW < Grotan BK.

수용성 절삭유에서 방청제가 방부제의 항균효능에 미치는 영향

수용성 절삭유에서 발생빈도가 높고 생존ㆍ성장력이 우수한 Pseudomonas aeruginosa를 사용하여 방청제가 방부제 (Kathon 886 MW, Triadine 3, Triadine 10 and Grotan BK)의 항균효능에 미치는 영향을 조사하였다. 실험결과 방부제와 방청제를 함께 사용할 경우 방부제의 효능은 첨가되는 방청제에 의해 그 영향을 받았다. Kathon 886 MW 항균효능은 SS 510과 MEA를 각각 첨가하였을 때 증가하였다. Triadine 3, Triadine 10, Grotan BK는 사용된 방청제에 대해 유사한 경향의 향균효능을 보였는데, CP-105, CP-E-7, MEA에 대해서 상승효과를 보였다. 그리고 방청제 고유의 항균력을 비교해 본 결과, CP-E-7과 MEA는 bioresistant 하였으며, 다른 방청제 (CP-105, AMIDE, SS-510, TEA)는 biosupportive하였다. 방부제 고유의 항균력을 비교해본 결과, Triadine 10 ＜ Triadine 3 < Kathon 886 MW < Grotan BK 순으로 항균성이 좋게 나타났다.