Cooling Water Inhibitor Performance

CORROSION ◽  
1960 ◽  
Vol 16 (10) ◽  
pp. 473t-478t ◽  
Author(s):  
P. R. PUCKORIUS ◽  
W. J. RYZNER
Keyword(s):  
Corrosion Inhibitors ◽  
Film Formation ◽  
Cooling Water ◽  
Water Systems ◽  
Continuous Treatment ◽  
Protective Film ◽  
Low Level ◽  
Start Up ◽  
Actual Field ◽  
High Level

Abstract Corrosion inhibitors in open recirculating cooling water systems require rapid and complete film formation for maximum effectiveness. The protective film is established on clean surfaces by initial treatment with inhibitor at high dosage levels. Protection then can be maintained by continuous treatment at substantially lower levels. If operational difficulties should cause loss of the protective film, low level treatment after the film has been lost may result in severely increased corrosion and deposition. Laboratory corrosion, deposition and consumption studies with polyphosphate-based and chromate-based inhibitors illustrate the advantages of high level start-up and low level maintenance treatments. These data are confirmed by actual field experiences. 5.8.1

An Electrochemical Study of Heteropoly Molybdates as Cooling Water Corrosion Inhibitors

CORROSION ◽  
1972 ◽  
Vol 28 (8) ◽  
pp. 299-306 ◽  
Author(s):  
A. WEISSTUCH ◽  
C E. SCHELL
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Electrochemical Techniques ◽  
Cooling Water ◽  
Electrochemical Study ◽  
Low Level ◽  
High Concentrations ◽  
High Level ◽  
Steel Electrodes

Abstract The utility of heteropoly molybdate compounds as cooling water corrosion inhibitors for mild steel was investigated by various electrochemical techniques. It was shown that high concentrations of heteropoly molybdates are required to passivate mild steel electrodes. The breakdown of passivity was studied as a function of inhibitor volume and concentration of aggressive anions. Various approaches for the economic utilization of heteropoly molybdates are described, including high level pretreatment-low level maintenance level regimes and formulation with polyphosphates and zinc.

Evaluation of corrosion inhibitors for cooling water systems operating at high concentration cycles

2009 ◽  
Vol 60 (5) ◽  
pp. 323-329
Author(s):  
E. A. de Souza ◽  
J. A. C. Ponciano Gomes ◽  
L. Y. Reznik ◽  
L. Sathler
Keyword(s):  
Corrosion Inhibitors ◽  
Cooling Water ◽  
Water Systems ◽  
High Concentration

Inhibition effect of phosphorus-based chemicals on corrosion of carbon steel in secondary-treated municipal wastewater

2013 ◽  
Vol 67 (11) ◽  
pp. 2412-2417 ◽  
Author(s):  
Zhanhui Shen ◽  
Hongqiang Ren ◽  
Ke Xu ◽  
Jinju Geng ◽  
Lili Ding
Keyword(s):  
Carbon Steel ◽  
Municipal Wastewater ◽  
Electrochemical Impedance ◽  
Cooling Water ◽  
Water Systems ◽  
Protective Film ◽  
Steel Electrode ◽  
Inhibition Effect ◽  
Treated Municipal Wastewater ◽  
Alternative Water

Secondary-treated municipal wastewater (MWW) could supply a viable alternative water resource for cooling water systems. Inorganic salts in the concentrated cooling water pose a great challenge to corrosion control chemicals. In this study, the inhibition effect of 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP), trimethylene phosphonic acid (ATMP) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) on corrosion of carbon steel in secondary-treated MWW was investigated by the means of potentiodynamic polarization and electrochemical impedance spectroscopy. The inhibition effect increased with increasing concentration of inhibitors. The corrosion rates of carbon steel were 1.5, 0.8, 0.2 and 0.5 mm a–1 for blank, HEDP, ATMP and PBTCA samples at 50 mg L–1, respectively. The phosphorus-based chemicals could adsorb onto the surface of the carbon steel electrode, form a coat of protective film and then protect the carbon steel from corrosion in the test solution.

Mannich Base Derivatives - A Novel Class of Corrosion Inhibitors for Cooling Water Systems

2001 ◽  
Vol 19 (1) ◽  
Author(s):  
K. Ravichandran ◽  
N. Manoj Kumar ◽  
K. Subash ◽  
T.S.N. Sankara Narayanan
Keyword(s):  
Corrosion Inhibitors ◽  
Mannich Base ◽  
Cooling Water ◽  
Water Systems

Evaluation of Corrosion Inhibitors for Component Cooling Water Systems

CORROSION ◽  
1993 ◽  
Vol 49 (11) ◽  
pp. 921-928 ◽  
Author(s):  
D. B. Alexander ◽  
A. A. Moccari
Keyword(s):  
Corrosion Inhibitors ◽  
Cooling Water ◽  
Water Systems

Improved Laboratory Technique for Investigating Corrosion by Recirculating Cooling Water

CORROSION ◽  
1963 ◽  
Vol 19 (3) ◽  
pp. 91t-101t ◽  
Author(s):  
A. ORMAN FISHER
Keyword(s):  
Heat Transfer ◽  
Corrosion Rate ◽  
Screening Test ◽  
Corrosion Inhibitors ◽  
Cooling Water ◽  
Water Systems ◽  
Laboratory Apparatus ◽  
Test Conditions ◽  
Test Loop ◽  
Fouling Characteristics

Abstract A description of an improved testing loop for the evaluation of cooling water corrosion inhibitors for open recirculating systems is given, together with the performance characteristics of the laboratory apparatus. The test equipment included heat transfer surfaces and permitted velocities of 2 to 3 feet per second. Corrosion rate comparisons are made with data previously obtained in a screening test loop operated under less severe test conditions. Attempts are made to detect the extent of scale build-up on heat transfer surfaces through losses in heat transfer and increased friction losses in the system. Results indicate that scaling and fouling characteristics of inhibited open cooling water systems were not satisfactorily measured in the apparatus described.

scholarly journals Corrosion Inhibitors for Cooling Water Systems

2001 ◽  
Vol 50 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Toshiharu Wake ◽  
Makoto Horiike
Keyword(s):  
Corrosion Inhibitors ◽  
Cooling Water ◽  
Water Systems
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