4BE3 U6 C3 Obj 2 EMH
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Questions and Answers

EASY What is the purpose of cleaning the coupons after removal from the rack?

  • To handle the coupons with bare hands
  • To ensure galvanic corrosion does not affect the results
  • To remove system contaminants and prepare for weighing (correct)
  • To remove the passive layer formed on the coupon

    • Why should coupons that have been in place for only a month not be compared to coupons in place for three months?

  • Because the longer-term coupons may have undergone galvanic corrosion
  • Because the most metal loss occurs in the first month as a passive layer forms (correct)
  • Because the longer-term coupons are more susceptible to system contaminants
  • Because the shorter-term coupons are less reliable

    • Why should you never handle coupons with bare hands?

  • To prevent oil, grease, or dirt from affecting the results (correct)
  • To ensure the Teflon bolts are not damaged
  • To ensure the coupon rack is not contaminated
  • To prevent galvanic corrosion from affecting the results

    • What is the purpose of using Teflon bolts to hold the coupons in place?

    <p>To prevent galvanic corrosion from affecting the results</p> Signup and view all the answers

    What is the unit of measurement for the corrosion rate expressed in?

    <p>Mils per year</p> Signup and view all the answers

    What is the primary test conducted to determine condensate purity?

    <p>Conductivity measurements</p> Signup and view all the answers

    What is the acceptable level of dissolved iron in a sample?

    <p>Below 0.5 ppm</p> Signup and view all the answers

    How are direct amine measurements made?

    <p>Using a chromatograph</p> Signup and view all the answers

    What is the purpose of corrosion coupons?

    <p>To estimate average corrosion rates</p> Signup and view all the answers

    What is the temperature requirement for taking a condensate sample?

    <p>Less than 32°C (90°F)</p> Signup and view all the answers

    Why are stainless steel lines used in sampling?

    <p>To reduce the risk of corrosion</p> Signup and view all the answers

    What is the purpose of a continuous fluorometer?

    <p>To measure and monitor the condensate amine concentration</p> Signup and view all the answers

    Where should samples be taken from?

    <p>At all critical points, including steam sections, condensate sections, and equipment critical to the operation</p> Signup and view all the answers

    MEDIUM What is the primary purpose of corrosion byproduct monitoring?

    <p>To identify corrosive substances</p> Signup and view all the answers

    What is the significance of throttling the sample flow at the outlet of the sampling system?

    <p>To ensure an adequate flow of material</p> Signup and view all the answers

    What is the advantage of using corrosion coupons?

    <p>They estimate average corrosion rates</p> Signup and view all the answers

    Why are stainless steel lines used in sampling?

    <p>Because they are more resistant to corrosion</p> Signup and view all the answers

    What is the primary purpose of a chromatograph in condensate analysis?

    <p>To analyze amine concentrations</p> Signup and view all the answers

    How often should samples be taken for accurate analysis?

    <p>At critical points in the system</p> Signup and view all the answers

    What is the purpose of purging the sampling device?

    <p>To remove air from the system</p> Signup and view all the answers

    What is the significance of cooling the sample to less than 32°C (90°F)?

    <p>To preserve the sample</p> Signup and view all the answers

    What is the primary reason for weighing the coupons after cleaning and drying?

    <p>To calculate the corrosion rate expressed in mils per year</p> Signup and view all the answers

    What is the purpose of the passive layer that forms on the coupon?

    <p>To reduce the corrosion rate</p> Signup and view all the answers

    What is the primary advantage of using Teflon bolts to hold the coupons in place?

    <p>They prevent galvanic corrosion</p> Signup and view all the answers

    What would be the result of handling coupons with bare hands?

    <p>The corrosion rate would increase</p> Signup and view all the answers

    What is the typical duration for which the coupons are immersed in the condensate?

    <p>1 to 3 months</p> Signup and view all the answers

    HARD What is the primary reason why galvanic corrosion can affect the test results?

    <p>It accelerates the corrosion rate on the coupon surface</p> Signup and view all the answers

    What is the primary advantage of using Teflon bolts to hold the coupons in place?

    <p>They prevent galvanic corrosion from occurring</p> Signup and view all the answers

    What is the significance of the passive layer that forms on the coupon?

    <p>It reduces the corrosion rate of the coupon</p> Signup and view all the answers

    What is the primary reason why the coupons are removed from the rack after 1 to 3 months?

    <p>To obtain an accurate measurement of the corrosion rate</p> Signup and view all the answers

    What is the primary reason why the coupons are weighed after cleaning and drying?

    <p>To calculate the corrosion rate in mils per year</p> Signup and view all the answers

    What is the primary benefit of using a continuous fluorometer in condensate analysis?

    <p>It allows for instantaneous monitoring and control of amine feed rates.</p> Signup and view all the answers

    Why are corrosion coupons only useful for estimating average corrosion rates?

    <p>Because they do not provide instantaneous readings of system corrosiveness.</p> Signup and view all the answers

    What is the primary purpose of correlating corrosion byproduct monitoring with other tests?

    <p>To measure the effectiveness of corrosion prevention methods.</p> Signup and view all the answers

    What is the significance of ensuring an adequate flow of material occurs during sampling?

    <p>It ensures representative sampling of the condensate.</p> Signup and view all the answers

    What is the primary advantage of using corrosion coupons over other corrosion monitoring methods?

    <p>They are simpler to use than other methods.</p> Signup and view all the answers

    What is the primary purpose of using a chromatograph in condensate analysis?

    <p>To identify the types of molecules present in the condensate.</p> Signup and view all the answers

    Why are corrosion coupons typically made of a metal composition similar to that of the piping system?

    <p>To simulate the corrosion rates of the actual piping system.</p> Signup and view all the answers

    What is the primary purpose of monitoring the corrosion byproducts of copper and iron?

    <p>To evaluate the effectiveness of corrosion prevention methods.</p> Signup and view all the answers

    Study Notes

    Primary Tests for Condensate

    • pH readings are conducted to measure the acidity or basicity of the condensate
    • Hardness tests are performed to determine the level of minerals in the condensate
    • Conductivity measurements are used to determine the purity of the condensate
    • Corrosion byproduct monitoring involves testing for iron oxides, copper oxides, and other corrosion products

    Corrosion Byproduct Monitoring

    • A commercially available iron analysis kit can be used to detect iron oxides
    • Wet chemistry tests measure the amount of dissolved iron in a sample, with readings below 0.5 ppm considered acceptable
    • Similar tests are available for copper analysis

    Direct Amine Measurements

    • A chromatograph is used to analyze a condensate sample and determine the molecules present
    • Samples can be taken using a grab-sample bag and sent to a lab for analysis
    • Some facilities use a continuous fluorometer to measure and monitor condensate amine concentration

    Sample Collection and Preparation

    • Samples should be taken at all critical points, including steam sections, condensate sections, and equipment prone to corrosion
    • Samples must be cooled to less than 32°C (90°F) before collection
    • The sample flow should be throttled at the outlet of the sampling system, and stainless steel lines should be used
    • An adequate flow of material (1.5 – 2.0 m/s) is necessary, and the sampling device should be purged

    Corrosion Coupons

    • Corrosion coupons are an inexpensive and simple way to evaluate corrosion rates
    • They are only useful for estimating average corrosion rates, not providing instantaneous readings of system corrosiveness
    • Coupons are metal strips of known mass, similar to the piping system's composition, and come in various shapes (strips, rods, discs)
    • They are immersed in condensate for 1-3 months, then removed, cleaned, dried, and weighed to determine the corrosion rate
    • The difference in weight over time gives an approximate corrosion rate, expressed in mils per year
    • Coupons should be handled with care to prevent contamination, and Galvanic corrosion should be prevented using Teflon bolts

    Primary Tests for Condensate

    • pH readings are conducted to measure the acidity or basicity of the condensate
    • Hardness tests are performed to determine the level of minerals in the condensate
    • Conductivity measurements are used to determine the purity of the condensate
    • Corrosion byproduct monitoring involves testing for iron oxides, copper oxides, and other corrosion products

    Corrosion Byproduct Monitoring

    • A commercially available iron analysis kit can be used to detect iron oxides
    • Wet chemistry tests measure the amount of dissolved iron in a sample, with readings below 0.5 ppm considered acceptable
    • Similar tests are available for copper analysis

    Direct Amine Measurements

    • A chromatograph is used to analyze a condensate sample and determine the molecules present
    • Samples can be taken using a grab-sample bag and sent to a lab for analysis
    • Some facilities use a continuous fluorometer to measure and monitor condensate amine concentration

    Sample Collection and Preparation

    • Samples should be taken at all critical points, including steam sections, condensate sections, and equipment prone to corrosion
    • Samples must be cooled to less than 32°C (90°F) before collection
    • The sample flow should be throttled at the outlet of the sampling system, and stainless steel lines should be used
    • An adequate flow of material (1.5 – 2.0 m/s) is necessary, and the sampling device should be purged

    Corrosion Coupons

    • Corrosion coupons are an inexpensive and simple way to evaluate corrosion rates
    • They are only useful for estimating average corrosion rates, not providing instantaneous readings of system corrosiveness
    • Coupons are metal strips of known mass, similar to the piping system's composition, and come in various shapes (strips, rods, discs)
    • They are immersed in condensate for 1-3 months, then removed, cleaned, dried, and weighed to determine the corrosion rate
    • The difference in weight over time gives an approximate corrosion rate, expressed in mils per year
    • Coupons should be handled with care to prevent contamination, and Galvanic corrosion should be prevented using Teflon bolts

    Primary Tests for Condensate

    • pH readings are conducted to measure the acidity or basicity of the condensate
    • Hardness tests are performed to determine the level of minerals in the condensate
    • Conductivity measurements are used to determine the purity of the condensate
    • Corrosion byproduct monitoring involves testing for iron oxides, copper oxides, and other corrosion products

    Corrosion Byproduct Monitoring

    • A commercially available iron analysis kit can be used to detect iron oxides
    • Wet chemistry tests measure the amount of dissolved iron in a sample, with readings below 0.5 ppm considered acceptable
    • Similar tests are available for copper analysis

    Direct Amine Measurements

    • A chromatograph is used to analyze a condensate sample and determine the molecules present
    • Samples can be taken using a grab-sample bag and sent to a lab for analysis
    • Some facilities use a continuous fluorometer to measure and monitor condensate amine concentration

    Sample Collection and Preparation

    • Samples should be taken at all critical points, including steam sections, condensate sections, and equipment prone to corrosion
    • Samples must be cooled to less than 32°C (90°F) before collection
    • The sample flow should be throttled at the outlet of the sampling system, and stainless steel lines should be used
    • An adequate flow of material (1.5 – 2.0 m/s) is necessary, and the sampling device should be purged

    Corrosion Coupons

    • Corrosion coupons are an inexpensive and simple way to evaluate corrosion rates
    • They are only useful for estimating average corrosion rates, not providing instantaneous readings of system corrosiveness
    • Coupons are metal strips of known mass, similar to the piping system's composition, and come in various shapes (strips, rods, discs)
    • They are immersed in condensate for 1-3 months, then removed, cleaned, dried, and weighed to determine the corrosion rate
    • The difference in weight over time gives an approximate corrosion rate, expressed in mils per year
    • Coupons should be handled with care to prevent contamination, and Galvanic corrosion should be prevented using Teflon bolts

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    Description

    This quiz covers the primary tests conducted on condensate, including pH readings, hardness tests, conductivity measurements, and corrosion byproduct monitoring.

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