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Organic corrosion inhibitors for industrial water treatment
The use of corrosion inhibitors in formulas for boiler cleaning and for cooling water is well established but an increasing number of regulations and the abolishment of various well-tried corrosion inhibiting actives put up a new challenge. Chromate, molybdate, nitrite, phosphonate and other inhibitors are being abandoned for either ecotox or cost reasons. It is the aim of this presentation to explain what alternatives might work. After a brief survey on structure and function of organic corrosion inhibitors, the function and the mechanisms of corrosion protection are discussed for acetylene derivatives in the light of their application in boiler cleaning and scale removal. Immersion tests and electrochemical measurements are used to monitor the effect of the inhibitors and their synergy with other additives. It is not expected that new compounds based on transition metals, phosphorous, and borine derivatives will be accepted as replacements for inhibitors that must be abandoned. It has been demonstrated that the corrosion inhibitors PP and PM exhibit very high corrosion inhibition efficiency as compared to conventional inhibitors (propargyl alcohol, butynediol) used in acidic formulations. Hydrogen cracking can be prevented to a large degree through the use of PM and it can be entirely prevented through a non-toxic new product that will be described in a later publication. PP and PM exhibit a synergistic anticorrosive effect with chelating agents. The practical use of PP and PM has been demonstrated in a water treatment facility.
Organic corrosion inhibitors for industrial water treatment
The use of corrosion inhibitors in formulas for boiler cleaning and for cooling water is well established but an increasing number of regulations and the abolishment of various well-tried corrosion inhibiting actives put up a new challenge. Chromate, molybdate, nitrite, phosphonate and other inhibitors are being abandoned for either ecotox or cost reasons. It is the aim of this presentation to explain what alternatives might work. After a brief survey on structure and function of organic corrosion inhibitors, the function and the mechanisms of corrosion protection are discussed for acetylene derivatives in the light of their application in boiler cleaning and scale removal. Immersion tests and electrochemical measurements are used to monitor the effect of the inhibitors and their synergy with other additives. It is not expected that new compounds based on transition metals, phosphorous, and borine derivatives will be accepted as replacements for inhibitors that must be abandoned. It has been demonstrated that the corrosion inhibitors PP and PM exhibit very high corrosion inhibition efficiency as compared to conventional inhibitors (propargyl alcohol, butynediol) used in acidic formulations. Hydrogen cracking can be prevented to a large degree through the use of PM and it can be entirely prevented through a non-toxic new product that will be described in a later publication. PP and PM exhibit a synergistic anticorrosive effect with chelating agents. The practical use of PP and PM has been demonstrated in a water treatment facility.
Organic corrosion inhibitors for industrial water treatment
Organische Korrosionsinhibitoren für die industrielle Wasserbehandlung
Dietsche, Frank (author) / Heidenfelder, Thomas (author) / Witteler, Helmut (author)
2007
10 Seiten, 11 Bilder, 2 Tabellen, 5 Quellen
Conference paper
Storage medium
English
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