7/18/2019 Pre-Asses CO2 Corrosion Rate

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1 Partial Pressure Ratio to consider CO₂ Corrosion

Partial Pressure H₂S

Pressure MPa 200

H₂S mole % 0.0068

H₂S Partial Pressure MPa 0.0136

Partial Pressure CO₂

Pressure MPa 40

CO₂ mole % 20

CO₂ Partial Pressure MPa 8

Partial Pressure Ratio 588.235294118

Susceptible to CO₂ Corrosion Susceptible

2 Corrosion Rate

Thickness Data

 Year 1988 1996 2003

Reading 0.488 0.456 0.422

Sort!"er# Corrosion Rate$S" % 0.0049 ##&'ear

(on)!"er# Corrosion Rate$ (" % 0.0044 ##&'ear

*aseline Corrosion Rate$ *Cr % 0.0040 ##&'ear

Corrosion Rate +Hi)est, % 0.0049 ##&'ear

3 Remaining Life Calculation

  % 0.14

Re#ainin) (i-e$ R( % 58.0588235294

4 Severity Level

Severity Level

1 0.01

2 0.01 ! 0.1

3 0.1 ! 1.0

4 1.0 ! 10.0

5 / 10.0

i)ure 1.1 Seerit' ne base on nstitute o- ner)' +,

Seerit' 1.6864

n#iti)ate Preiction Corrosion Rate -or CO₂ Corrosion -or Preli#inar' 7esi)

t initial

  t preious

  t actual

t reuire

UnmitigatedCorrosion Rate

mm!yr"

7/18/2019 Pre-Asses CO2 Corrosion Rate

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eS % H₂S

arl' assess#ent

eCo: % CO₂