Microbiologically Influenced Corrosion (MIC) is a contributing force in corrosion of wet, dry and pre-action fire sprinkler systems. Symptoms of MIC include pinhole leaks, smelly water, black water and tubercles (mounds on pipe wall).

These symptoms were long considered to be "normal" for fire sprinkler systems and to be part of the industry. Unfortunately, these corrosive symptoms have increased in the last few years, costing the industry millions of dollars annually. Further investigation has discovered that MIC is a leading factor, causing some to look for solutions to their corrosion problems before they cause extensive damage. There are many other signs of corrosion; however most will generally involve a closer look at the system.

Potter offers several very simple, noninvasive avenues in which to test your system and provide answers to 3 very important questions:

  1. Do you have corrosion in your system?

  2. What type of corrosion do you have in your system?

  3. How should you handle any corrosion you may have in your system?


BAC-PAK

Bacterium Test Kit


The BAC-PAK is a do-it-yourself test kit designed to allow field testing of wet pipe sprinkler systems and/or water supplies for MIC causing bacterium. The kit allows field testing for; Iron related bacterium (iron-pipe oxidizing and reducing bacterium); Sulfate Reducing Bacterium (causes pit corrosion) and Acid Producing Bacterium (causes pit corrosion). The testing takes just a few minutes. The results will appear over a period of up to 9 days to allow for bacteria culture growth.

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WTK

Water Test Kit


This kit is designed to conform to the requirements of NFPA 13, 2013, 24.1.5.1 requiring:

Water supplies and environmental conditions shall be evaluated for the existence of microbes and conditions that contribute to microbiologically influenced corrosion (MIC).

Five groups of bacteria will be Tested: Heterotrophic Bacterium which determines if the majority of bacterium are anaerobic (without air) or aerobic (with air) in nature; Slime Forming Bacterium (aids in tubercle formation); Iron Related Bacterium (iron-pipe oxidizing and reducing bacterium); Sulfate Reducing Bacterium (causes pit corrosion) and Acid Producing Bacterium (causes pit corrosion).

A full written report will be provided approximately 15 business days after testing is started.

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Pipe Failure Corrosion Analysis


This analysis is available for identification of the corrosion/failure mechanism, i.e. pitting corrosion, stress corrosion cracking, microbiologically influenced corrosion, galvanic corrosion, etc. of failed sprinkler pipe. The analysis involves removing a section of the failed pipe from the fire sprinkler system and sending to a certified third party lab for testing. Material flaw/quality evaluations will be made to determine potentially related factors to the failure condition. This will include metallographic examination for micro structural flaws or abnormalities.

The methods used in the failure / corrosion analysis will typically include visual examination, examination by optical microscopy, examination by scanning electron microscopy (SEM), metallographic examinations (cross sectional examination of material microstructure), energy dispersive spectroscopy (EDS) of corrosion products/residues, microbiological activity studies, hardness survey and chemical analysis. A formal report, with photographic documentation will be generated upon completion approximately 15 business days after the test is started.

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$2,950

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Pipe Sample Test


This kit is designed to conform to the requirements of NFPA 25, 2011, 14.2.1.3 requiring:

Tubercules or slime, if found, shall be tested for indications of microbiologically influenced corrosion (MIC)

The test involves removing some of the slime, deposit, scale, tubercules, mounds, etc. from the pipe section at Potter for microbiologically influenced corrosion (MIC) analysis.

Five groups of bacteria will be tested: Heterotrophic Bacterium which determines if the majority of bacterium are anaerobic (without air) or aerobic (with air) in nature; Slime Forming Bacterium (aids in tubercle formation); Iron Related Bacterium (iron-pipe oxidizing and reducing bacterium); Sulfate Reducing Bacterium (causes pit corrosion) and Acid Producing Bacterium (causes pit corrosion).

A full written report will be provided approximately 15 business days after testing is started.

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