Multi-part anti-microbial concentrate system, activated solution, use-dilution solution, method of making same, and method of sterilizing with the use-dilution solution

A use-dilution anti-microbial solution comprising:

• about 0.05 wt % to about 0.5 wt % performic acid;
• about 0.07 wt % to about 1.5 wt % formic acid;
• about 0.4 wt % to about 6.0 wt % hydrogen peroxide;
• about 0.1 wt % to about 0.5 wt % block copolymer of ethylene oxide and propylene oxide;
• about 0.1 wt % to about 0.5 wt % phosphoric acid;
• about 0.1 wt % to about 1.0 wt % benzotriazole;
• and
• a remainder water.

A method of preparing a use-dilution solution comprising:

• (a) preparing a first component comprising about 30 wt % to about 50 wt % hydrogen peroxide, about 1.8 wt % to about 10 wt % benzotriazole and the remainder water;
• (b) preparing a second component comprising about 20 wt % to about 95 wt % formic acid, about 2.5 wt % to about 12 wt % block copolymer of ethylene oxide and propylene oxide, about 4 wt % to about 20 wt % phosphoric acid and the remainder water;
• and
• (c) mixing the first component and the second component in a weight ratio of 60:40 to form an activated solution;
• and
• (d) diluting the activated solution with water.

An anti-microbial activated solution at equilibrium comprising:

• 25 wt % hydrogen peroxide;
• 6.5 wt % formic acid;
• 4.5 wt % to 5.0 wt % performic acid;
• 1.38 wt % benzotriazole;
• 1.38 wt % block copolymer of ethylene oxide and propylene oxide;
• 2.0 wt % phosphoric acid;
• and
• a remainder of water to 100%.

An anti-corrosive system suitable for use with formic acid and hydrogen peroxide, said system comprising:

• (a) phosphoric acid;
• (b) benzotriazole;
• and
• (c) a block co-polymer of ethylene oxide and propylene oxide.