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Photoelectrochemical study of inorganic inhibitor films formed on mild steel in aerated municipal water
Steel pipes and tanks are used commonly for boilers, heating systems and cooling towers that circulate municipal or industrial water. Steel corrodes in water, and corrosion inhibitor commonly are added to protect the steel surface and minimize corrosion. Corrosion inhibition of steel is a result of a barrier film forming between the steel and the environment. This barrier film is difficult to study because it is thin and because it changes upon removal from the solution. However, the film can be studied in situ using its response to light. Photoelectrochemistry (PEC) is a technique by which the metal, immersed in the electrolyte, is illuminated with monochromatic light. PEC was used to study the inhibited films that formed on mild steel in aerated municipal water. Tests included three types of inorganic inhibitors that contained as active ingredients either molybdate, nitrite, or zinc salt phosphate compounds. Each inhibited system exhibited a unique photospectrum and a unique photostrom-voltage response. It was postulated that the three types of inhibitors formed three different barrier films on the mild steel immersed in municipal water.
Photoelectrochemical study of inorganic inhibitor films formed on mild steel in aerated municipal water
Steel pipes and tanks are used commonly for boilers, heating systems and cooling towers that circulate municipal or industrial water. Steel corrodes in water, and corrosion inhibitor commonly are added to protect the steel surface and minimize corrosion. Corrosion inhibition of steel is a result of a barrier film forming between the steel and the environment. This barrier film is difficult to study because it is thin and because it changes upon removal from the solution. However, the film can be studied in situ using its response to light. Photoelectrochemistry (PEC) is a technique by which the metal, immersed in the electrolyte, is illuminated with monochromatic light. PEC was used to study the inhibited films that formed on mild steel in aerated municipal water. Tests included three types of inorganic inhibitors that contained as active ingredients either molybdate, nitrite, or zinc salt phosphate compounds. Each inhibited system exhibited a unique photospectrum and a unique photostrom-voltage response. It was postulated that the three types of inhibitors formed three different barrier films on the mild steel immersed in municipal water.
Photoelectrochemical study of inorganic inhibitor films formed on mild steel in aerated municipal water
Photoelektrochemische Untersuchung anorganischer Inhibitorschichten auf Baustahl in belüftetem Stadtwasser
Burleigh, T.D. (author) / Paris, A. (author) / Chan, K.H. (author) / Okuma, M. (author) / Katayama, H. (author)
Corrosion, Houston ; 54 ; 237-240
1998
4 Seiten, 4 Bilder, 1 Tabelle, 9 Quellen
Article (Journal)
English
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