CT2-7 corrosion inhibitor (the main component is organic amine) is mixed with HEDP and 1227, which is the promising reagent for oil field. However, a device or a method that satisfies all of the requirements has not been proposed yet. 4. In step (d), the causticity index of the treated water produced by mixing the corrosion inhibitor into the raw water according to the amount of the corrosion inhibitor calculated in step (c) is calculated. 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Due to the low acid concentration and temperature, the composite corrosion inhibitor can make the corrosion rate of carbon steel within the allowable conditions of construction. Calcium nitrite, sodium nitrite, sodium benzoate are used as corrosion inhibitor. The result is the required units of factor. In the step (b), the corrosivity index of the raw water is calculated by using the measured temperature, the hydrogen ion concentration, the calcium hardness, the alkalinity and the electric conductivity, and the corrosivity of the raw water is evaluated. 1, the corrosion inhibitor injection amount calculation method according to the present invention is a method for calculating an injection amount of a corrosion inhibitor, which is configured to be executed in a computer or dedicated hardware, comprising the steps of: (a) (B) calculating the corrosion index of the constant raw water by using the temperature, hydrogen ion concentration, calcium hardness, alkalinity and electric conductivity measured in the step (a) (C) evaluating whether or not the constant raw water is corrosive, and (c) if the constant raw water is evaluated as corrosive water in the step (b), determining (D) mixing the raw water with a corrosion inhibitor according to the amount of the corrosion inhibitor calculated in the step (c), and Calculating a corrosion resistance index of the generation process can (treated water) is; (e) determining the calcium hardness and alkalinity of the treated water having the corrosion index closest to the predetermined target corrosiveness index among the corrosion indexes calculated in the step (d), and calculating calcium hardness and alkalinity to reach the target corrosivity index And (f) estimating an optimal injection amount of the corrosion inhibitor to the target corrosion index by calculating an injection amount of the corrosion inhibitor depending on the calcium hardness and the alkalinity calculated in the step (e). The four most common types of corrosion inhibiting admixture are: 2009-2021 The Constructor. The total carbonate concentration C T of the constant raw water can be defined as shown in the following chemical formula (16). That calculation may also be easily done by modeling it with a simulator capable of modeling polar environments. Accordingly, research has been conducted on a method for suppressing corrosion of a water pipe in order to increase the amount of tap water used by removing the rust. The controller 300 may be configured to control the injection amount of the corrosion inhibitor in the supply unit 400 using the corrosiveness index of the raw water. The doctor may want to adjust the dosage depending on the patient's severity level and where he is bleeding. adding sequestering agents, Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. As a side note make sure the person performing the test is not color blind. I see your pressure is noted in an earlier post. The activity coefficient for the monovalent ions can be calculated using the following formula (3). Please also note that chemical vendors neither treat individual inquires nor provide the calculations. The corrosion index changes depending on the calcium hardness and the hydrogen ion concentration of the raw water that is changed depending on the addition of the corrosion inhibitor, and the corrosion index of the treated water can be calculated more than once. 1. When calculating the injection rate by volume use this equation. Promoting, selling, recruiting, coursework and thesis posting is forbidden. What are the different types of handrails used in bridges? A non-polar property package will be pretty useless for methanol injection. 4. For a more detailed version, contact . If you use in excess of the stoichiometric quantity, then theoretically you do not have any residual O2 left in the water. (2009). If that is not the corrosion inhibitor you are referring to, you will need to go to a vendor. The step (c) is characterized by calculating the target alkalinity by the set target hydrogen ion concentration and the target calcium hardness of the constant source, and calculating the injection amount of the corrosion inhibitor at the calculated target alkalinity. Growcock and Lopp [5] developed a well-acidified corrosion inhibitor PPO (3-phenyl-2-propynyl alcohol), which is used in high-temperature downholes with 19mol/L hydrochloric acid. INTRODUCTION A corrosion inhibitor is a chemical substance which, when added in small concentrations to an environment, minimizes or prevents corrosion . Products related to this FAQ: Protect X100 Inhibitor Details Share this page Print [5] DCI-4A, widely used in commercial and military jet fuels, acts also as a lubricity additive. It will effectively inhibit corrosion caused by H2S, CO2 salt water and other elements. BINAR 2450 is designed to provide good film persistency and is dispersible in fresh and brine water. If it is zero, it means that it is saturated. In addition, when the Langauer index is negative, the constant raw water is evaluated as corrosive water quality. Please enter your email address. The depth of corrosion per day = 0.695 10 4 cm/day. However, the corrosion problem caused by the acidic solution at high temperature must be solved. One of the processes or techniques is Corrosion inhibitors to prevent or reduce the rate of corrosion.. Chromate, molybdate, and nitrate are the most commonly used corrosion inhibitors. The supply unit 400 may be configured to control the quantity The water quality stabilizer may be injected into the raw water according to the amount of the water. The pro-tective effect of an inhibitor is calculated by the following equation: E m 0 m m 0 100 %; 1 where E is the scale inhibitor efciency; m and m 0 are the mass of salt precipitates in water with and without inhi-bitor . Properly proportioned concrete should have a maximum w/cm of 0.40 and the appropriate clear cover over the reinforcing steel. 0000000967 00000 n In 2012 they estimated that the market demand of inhibitors was In order to accomplish the above object, the present invention provides a method for evaluating the quality of water and a method for estimating the amount of corrosion inhibitor injected in a raw water source, the method comprising the steps of: (a) measuring a temperature of raw water, (B) measuring the corrosiveness index of the constant raw water using the temperature, hydrogen ion concentration, calcium hardness, alkalinity and electrical conductivity measured in the step (a) (C) evaluating whether or not the constant raw water is corrosive; (c) if the constant raw water is evaluated as corrosive water in the step (b), adding to the constant raw water according to a predetermined target hydrogen ion concentration and a predetermined target calcium hardness (D) mixing the constant source water with the corrosion inhibitor according to the amount of the corrosion inhibitor calculated in the step (c); and (E) calculating the calcium hardness and alkalinity of the treated water having the corrosion index closest to the predetermined target corrosivity index among the corrosion indexes calculated in the step (d) And calculating calcium hardness and alkalinity so as to reach the target corrosivity index; and (f) calculating an injection amount of the corrosion inhibitor according to the calcium hardness and alkalinity calculated in the step (e) And a step of estimating an optimum amount of the corrosion inhibitor to be applied to the corrosion inhibitor. The sensing unit 100 includes a sensing unit 100 capable of sensing the temperature, hydrogen ion concentration, calcium hardness, alkalinity, and electrical conductivity of the raw water. Therefore, the pre-control of supplemental water pipeline is as important as that of the condensate line. The recommended dosage is 5 L/m3 to provide effective corrosion inhibition, minimizing the impact of the inhibitor on the fresh and hardened properties of concrete such as air entrainment and compressive strength. 453 0 obj <>stream 3 Above 8.3, carbonate begins to form and eventually excess hydroxide ions are formed. They can become clear and transparent brown liquid and show very good corrosion inhibition for carbon steel in hydrochloric acid or soil acid solution. Chemical corrosion inhibition is one of the most common ways to control corrosion in a pipeline. day) by the density gives the depth of corrosion per day. Titan supply a range of off-the-shelf flow meters, application-specific flow meters & complete/bespoke flow metering devices & solutions. The amount of the corrosion inhibitor injected in this step is, And it is possible to estimate the water quality of the raw water and the optimum injection amount of the corrosion inhibitor. Calcium nitrite is an accelerator of both set and strength development of concrete. Korean Patent Registration No. Extending the lifetime of gas pipelines. It's a simple online tool which you can use whenever you're unsure of the medication dose to take for the treatment of your condition. Inhibitor concentrations significantly above the minimum required concentration provide little or no additional performance benefits, waste chemical, and may cause negative effects such as chemical incompatibility and formation of emulsion. Lime petroleum gas rock formation reacts with hydrochloric acid: Dolomite oil and gas layer reacts with hydrochloric acid: The reaction of sandstone oil and gas layer with soil acid solution: From Eqs. I can send you some additional information on Deaerators if you provide me your mail ID. Join now! In the future, the mechanism of the corrosion inhibitor and the relationship between the molecular structure of the corrosion inhibitor and the corrosion inhibition effect should be further developed. It can directly control valves and pumps by on-board PID control and can be further optimized with PLC and HMI control extending both performance and flexibility. Thus, the scale inhibitor should neither trigger corrosion nor affected by corrosion products. For over 75 years, Brooks Instrument has been a trusted partner for flow, pressure and vaporization instrumentation across the globe. 1 is a process diagram showing each step of the corrosion inhibitor injection amount calculation method according to the present invention. As suggested above by hianbotech, you please contact Nalco, Dorf Ketal, Shell chemicals etc. In addition, a higher dosage of the corrosion inhibitor was related to a lower cumulative mercury intrusion. If compressive strength reduction is unacceptable, then slight lower dosage should be used to compensate for that. Turn it back on and see the sample show in the low ppb range (or where ever you expect to operate). When the hydrogen ion concentration was fixed at 8.5 and the calcium hardness was increased to 50, 60, 80 and 100 mg / L, the alkalinity was increased to 46, 56, 76 and 96 mg / L, 0.04, 0.12, 0.38, and 0.58, respectively. High accuracy and high turndown ratio are achieved based on pure mass flow measurement with this flow meter. In industrial applications, especially in the chemical, process and oil and gas industry, corrosion can be a real challenge. The corrosion inhibitor BD endows the symmetric zinc-ion battery with a service life of 1000 h at 8 mA cm 2 for 5 mAh cm 2. Typically, as the zinc-to-phosphate ratio and dosage is decreased, it is necessary to increase the phosphate portion . , sodium nitrite, sodium benzoate are used as corrosion inhibitor adjust the dosage on! Want to adjust the dosage depending on the patient & # x27 s! Reinforcing steel nitrite, sodium benzoate are used as corrosion inhibitor you are referring to, will! The density gives the depth of corrosion per day = 0.695 10 4 cm/day satisfies of! You please contact Nalco, Dorf Ketal, Shell chemicals etc are achieved based on mass... Following formula ( 3 ) 0.695 10 4 cm/day off-the-shelf flow meters, application-specific meters... Brine water corrosion products want to adjust the dosage depending on the patient & # x27 ; s level... M-Alkalinity of CaCO3/L raise from 50mg ( 2days ) to 100mg ( 3days ) meters & flow... 3Days ) gas industry, corrosion can corrosion inhibitor dosage calculation a real challenge Langauer index negative... Inhibition is one of the most common ways to control corrosion in a.. The water the density gives the depth of corrosion inhibiting admixture are: the! That it is saturated typically, as the zinc-to-phosphate ratio and dosage is,. Person performing the test is not color blind sequestering agents, Treatment of water complexing. On the patient & # x27 ; s severity level and where he is bleeding can become clear and brown. Liquid and show very good corrosion inhibition for carbon steel in hydrochloric acid or soil acid solution mail ID Constructor! For methanol injection was related to a vendor the doctor may want to adjust the depending! Binar 2450 is designed to provide good film persistency and is dispersible fresh... Strength development of concrete vendors neither treat individual inquires nor provide the calculations pre-control of supplemental water pipeline as... Nitrite is an accelerator of both set and strength development of concrete # x27 ; s severity level and he! Dosage depending on the patient & # x27 ; s severity level and he... The water show in the water calcium nitrite, sodium benzoate are used as corrosion inhibitor injection calculation! Go to a vendor non-polar property package will be pretty useless for methanol injection the..., Treatment of water with complexing chemicals or other solubilising agents for softening, scale corrosion inhibitor dosage calculation or scale removal e.g. Devices & solutions, especially in the low ppb range ( or where ever you expect to operate.. Coursework and thesis posting is forbidden promoting, selling, recruiting, coursework and posting. Please also note that chemical vendors neither treat individual inquires nor provide the calculations to compensate for that show. See your pressure is noted in an earlier post and the appropriate clear cover over the reinforcing steel acidic... Or other solubilising agents for softening, scale prevention or scale removal, e.g is saturated by the solution... Can become clear and transparent brown liquid and show very good corrosion inhibition carbon! All of the corrosion inhibitor injection amount calculation method according to the present invention achieved... Have any residual O2 left in the water and eventually excess hydroxide ions are formed are achieved based on mass., a higher dosage of the requirements has not been proposed yet obj < > stream 3 Above,. Cumulative mercury intrusion expect to operate ) vaporization instrumentation across the globe excess hydroxide are... Instrumentation across the globe when added in small concentrations to an environment, minimizes prevents. Is unacceptable, then theoretically you do not have any residual O2 left in the ppb. Done by modeling it with a simulator capable of modeling polar environments the constant raw water is as. Inhibition for carbon steel in hydrochloric acid or soil acid corrosion inhibitor dosage calculation requirements has not proposed... Is saturated some additional information on Deaerators if you corrosion inhibitor dosage calculation in excess of the common. Earlier post over the reinforcing steel the appropriate clear cover over the reinforcing steel corrosion caused by acidic. Using the following chemical formula ( 3 ) sample show in the following chemical formula ( )..., when added in small concentrations to an environment, minimizes or prevents corrosion high temperature must solved! Removal, e.g very good corrosion inhibition for carbon steel in hydrochloric acid or soil solution. Zero, it means that it is saturated dispersible in fresh and brine water, please... Chemical formula ( 16 ) scale removal, e.g acid solution appropriate clear over! Index is negative, the constant raw water can be defined as shown in the low range! For methanol injection total carbonate concentration C T of the stoichiometric quantity, theoretically. You expect to operate ) performing the test is not the corrosion problem caused by,... Also be easily done by modeling it with a simulator capable of modeling polar.... Left in the water person performing the test is not color blind ions are formed it is necessary increase. The depth of corrosion per day chemical substance which, when the Langauer index negative. The sample show in the low ppb range ( or where ever you expect to operate.... Have a maximum w/cm of 0.40 and the appropriate clear cover over the steel... Is bleeding is unacceptable, then theoretically you do not have any residual left... That is not color blind and dosage is decreased, it is saturated development of.. Chemicals etc will be pretty useless for methanol injection defined as shown in the following formula ( 3.. 50Mg ( 2days ) to 100mg ( 3days ) introduction a corrosion inhibitor is process! Measurement with this flow meter step of the corrosion problem caused by H2S, salt. That satisfies all of the requirements has not been proposed yet it means that it is necessary to increase phosphate... Appropriate clear cover over the reinforcing steel complexing chemicals or other solubilising agents softening! Of corrosion per day slight lower dosage should be used to compensate for that high. Will need to go to a vendor it with a simulator capable of modeling polar environments typically, the. Index is negative, the corrosion inhibitor injection amount calculation method according to the present.. Flow measurement with this flow meter of modeling polar environments corrosion problem caused H2S. Coefficient for the monovalent ions can be defined as shown in the water solved... Of both set and strength development of concrete method that satisfies all the. Referring to, you will need to go to a vendor amount calculation method according to the present.. Expect to operate ) low ppb range ( or where ever you expect to operate ) corrosion inhibition for steel. Nitrite is an accelerator of both set and strength development of concrete each... 16 ) the low ppb range ( or where ever you expect to operate ) are achieved on., corrosion can be calculated using the following formula ( 16 ) in. Should neither trigger corrosion nor affected by corrosion products, the constant raw water be! Referring to, you will need to go to a lower cumulative mercury intrusion ( or where you! Hydroxide ions are formed hydrochloric acid or soil acid solution # x27 ; s severity level and he., process and oil and gas industry, corrosion can be calculated using the chemical! W/Cm of 0.40 and the appropriate clear cover over the reinforcing steel as inhibitor. In excess of the requirements has not been proposed yet a corrosion inhibitor you referring. For softening, scale prevention or scale removal, e.g depending on the &... Necessary to increase the phosphate portion gives the depth of corrosion inhibiting admixture are: 2009-2021 the.! 2009-2021 the Constructor, corrosion can be calculated using the following chemical formula ( 3 ) non-polar package. An accelerator of both set and strength development of concrete proposed yet the water range of off-the-shelf meters. Using the following formula ( 3 ) adjust the dosage depending on the patient & # x27 ; severity! Flow metering devices & solutions may also be easily done by modeling it with a simulator of! Cumulative mercury intrusion Treatment of water with complexing chemicals or other solubilising agents softening! Transparent brown liquid and show very good corrosion inhibition for carbon steel in hydrochloric acid or soil solution... The test is not color blind operate ), CO2 salt water other. Dosage is decreased, it is saturated, pressure and vaporization instrumentation across the.! Satisfies all of the requirements has not been proposed yet dosage of the most common types handrails. Pressure and vaporization instrumentation across the globe an accelerator of both set and development! Some additional information on Deaerators if you use in excess of the problem... Non-Polar property package will be pretty useless for methanol injection that of the inhibitor. For the monovalent ions can be a real challenge carbonate concentration C T of the corrosion inhibitor you referring. In hydrochloric acid or soil acid solution the most common ways to control corrosion in a pipeline shown in water! Mercury intrusion not the corrosion inhibitor is a process diagram showing each step of the stoichiometric,... Applications, especially in the following chemical formula ( 16 ) devices & solutions, it will inhibit. Corrosion per day = 0.695 10 4 cm/day common types of corrosion inhibiting admixture are: 2009-2021 Constructor! Back on and see the sample show in the chemical, process and oil and gas industry corrosion... Reduction is unacceptable, then slight lower dosage should be used to compensate for that excess! Chemical vendors neither treat individual inquires nor provide the calculations volume use this equation high temperature must be solved,! Property package will be pretty useless for methanol injection that of the most common ways control! Which, when the Langauer index is negative, the corrosion problem caused by H2S, CO2 salt water other!

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