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Keywords: corrosion rate
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Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16863
... Abstract A 2018 case study (C2018-10909) required a rapid quantitative assessment of the external corrosion rate (CR) that buried station piping was subject to when equipped with an underperforming Cathodic Protection (CP) system in a high electrolyte resistivity environment. Originally...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16967
... Abstract It is important to monitor the corrosion rates of steel in electrolyte environments such as aqueous solution as well as soil in order to evaluate the integrity of the members of facilities. As a nondestructive monitoring method, CIPE (Current Interrupted Polarizing Extrapolation...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16443
... = 4.5) at 25°C. Linear polarization resistance (LPR) measurements were conducted to determine the corrosion rate (CR) over a wide range of CI concentrations, from which surface saturation concentration and surface coverage values were extracted. Kinetic parameters for adsorption (kA, kD, and KAD) were...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16384
... is used as online corrosion monitoring tool to monitor the metal loss and determine the corrosion rate of the pipelines. In addition, the data from the FSM units can be used to support other studies such as pigging and corrosion inhibitor optimization. This paper will cover the real time corrosion...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16283
... adjustment and HLP solution. Thermodynamic calculations for predicting the saturation pH, hydrogen permeation tests, corrosion rates and fine characterizations of iron sulfide scales were performed for being correlated to SSC test results and for understanding the impact on the hydrogen uptake...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12767
... submerged in 3.5 wt. % NaCl solution and CO2/H2S mixture with the composition mentioned earlier was bubbled for 30 days. Determination of corrosion rate To determine the corrosion rate, the ASTM G1-03 procedure was followed.67 The specimens were initially cleaned and weighed before exposure testing...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12756
... of the author(s) and are not necessarily endorsed by the Association. given for descriptive purposes in this study. ILSS is a sum of four terms, i.e., A: temperature, B: wall shear stress (WSS), C: Total Dissolved Solids (TDS) and D: corrosion rate (CR). They categorized ILSS into four risk levels as shown...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12822
..., are inserted into the process stream of interest and after a period of time are removed and analyzed. The analysis typically consists of visual examination of the appearance of any corrosion damage and an assessment of any change in weight. Though changes in weight can provide an estimate of the corrosion rate...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12845
... of the medium. Figure 2 shows a typical process for protective layer formation.2 After a high starting corrosion rate, the deposition of Cu ions and the integration into the protection layer continuously decreases until a very low base level of Cu ion deposition is set that is retained for several years...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12768
... and low cost. However, carbon and low alloy steels tend to corrode in the presence of wet CO2, particularly in the presence of dissolved salts and acids.5-9 Other metals, alloys and polymers also degrade in the presence of high pressure gaseous and supercritical(1) CO2.10-16 The corrosion rate of carbon...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12744
..., the weights of the specimens were weighed with a METTLER TOLEDO(6) electronic balance with a precision of 0.1 mg. The corrosion rate of each specimen was calculated using the equation below: = (1) Where (g·m 2·h 1) is the corrosion rate and (g) and (g) are the weights of a specimen before or after the 4h...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12838
... and corrosion resistance, in the static and dynamic water- saturated supercritical CO2 environments. Results showed that X70 and 3Cr steels mainly suffered from localized corrosion, and both the general and localized corrosion rates under static condition were higher than that under dynamic condition. 3 wt.% Cr...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12869
... corrosion rate corrosion product layer thermodynamic model pyrite A Modified Thermodynamic Model for the Prediction of Mild Steel Corrosion Product Formation at High Temperature in an Aqueous H2S Environment Shujun Gao, Bruce Brown, David Young, Srdjan Nesic, Marc Singer Institute for Corrosion...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12763
... the corrosion rates, corrosion potential and repassivation potential as a function of temperature, alkalinity, pH, partial pressure of gases (including H2S), and concentrations of various aggressive species. The corrosion rates and potential are computed using the mixed-potential theory by considering the main...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12901
... by the high PRE, both tube dimensions had a CPT above 100°C in delivery condition, see Table 2. In the immersion experiments in 1.5 wt-% HCl at boiling point and 50 wt-% H2SO4 at 50°C, the corrosion rate was 0.0 mm/year indicating that no corrosion had taken place. Low corrosion rate was experienced...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12894
... de-aerated HCl injections. For each alloy considered, 3 HIC specimens machined according to NACE TM0284 and 3 weight loss coupons were exposed simultaneously. The latter were used to evaluate the average corrosion rate. For reference HIC tests without oxygen supply, the test protocol can...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12885
... and pH values (30°C, 50°C and 85°C; pH=6 and 8). The corrosion rates of the test specimens calculated by both linear polarization resistance (LPR) and weight loss methods indicated optimum lignin performance for all the temperature conditions tested and a pH of 6. The test medium containing lignin...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12770
... residuals and corrosion rates. This increases the cost of the treatment. In addition, halogenated triazole derivatives form as reaction products and are highly toxic to aquatic organisms. The reaction of TT with free chlorine to form Cl-TT is shown below. Figure 2: Mode of triazole halogenation occurs...

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