There are many ways to deal with MIC. Are they anchored only on chlorination as the only solution? Are they also experiencing fouling in addition to MIC?
Possible solutions;
1) metallurgy - duplex stainless steel is a common upgrade for cooling water fouling and corrosion protection. This is likely the cheapest long term solution
2) Biocide chemistry - more complex because it requires an injection, monitoring and control. Chlorine can be used but has a toxicity hazard of gas so a safer option is sodium hypochlorite or bleach vs. Cl-. This may be cheaper in the short term vs. metallurgy but takes much more resources to manage safely
3) Coatings - why not coat the inside of the exchanger with electroless nickel and Teflon (PTFE) plating? This is much cheaper than duplex stainless, won't corrode and the Teflon will shed hard water scale.
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Kerry Barbetti
System Reliability Engineer
Koch Industries, Inc.
rosemount MN
651-437-0894
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Original Message:
Sent: 06-03-2019 10:49 AM
From: Sudhindra Hathwar
Subject: Chlorination for MIC
Hello All,
Greetings for the day!
One of our customer are facing MIC induced pitting corrosion in sea water cooler (shell and tube heat exchanger). They want to avoid it by some biocides or through chlorination.
Request to give your input on waht is the ppm of Cl allowed or safe if they want to go for Chlorination. Or if they go for biocide then please suggest type, brand etc.
Your valuable inputs will be appretiated.
Thanks & Regards
Sudhindra
Business Development Manager
Sandvik Asia P Ltd
India
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Sudhindra Hathwar
Business Development Manager
Sandvik Materials Technology
Pune MA
9590344999
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