Search
Filters
Close

51313-02220-Design Flaw Induced Corrosion

Product Number: 51313-02220-SG
ISBN: 02220 2013 CP
Author: Abdul Razzaq Al-Shamari
Publication Date: 2013
$0.00
$20.00
$20.00

Design Flaw Induced Corrosion (DFIC) is a new term coined by the authors to capture those corrosion failures in some exotic alloys that have occurred just after a few years of service – in some cases just two years. In DFIC corrosion failures occur by some known corrosion phenomena which actually should not exist due to the high grade of metallurgy used in construction of the equipment.

In the subject case a thermowell made of Monel metal and installed in a desalter corroded extensively and also perforated leading to leak of crude. This resulted in shut down of an entire unit for few days. The finding that Monel metal is highly compatible for the intended service and has failed within two years’ of service was an eye opener and lead to some gap analysis in the design stage.

This paper highlights the findings of an investigation of a failure of thermowell made from Monel material. Monel is highly resistant to chloride attack. But the thermowell still failed by extensive corrosion in a very short duration of two years. The failure is combination of galvanic action and then corrosive attack by iron chloride on Monel.

The paper discusses at length the conditions under which the Monel material had undergone aggravated corrosion and also discusses a few remedies.

Key words: Design flaw corrosion.
 

Design Flaw Induced Corrosion (DFIC) is a new term coined by the authors to capture those corrosion failures in some exotic alloys that have occurred just after a few years of service – in some cases just two years. In DFIC corrosion failures occur by some known corrosion phenomena which actually should not exist due to the high grade of metallurgy used in construction of the equipment.

In the subject case a thermowell made of Monel metal and installed in a desalter corroded extensively and also perforated leading to leak of crude. This resulted in shut down of an entire unit for few days. The finding that Monel metal is highly compatible for the intended service and has failed within two years’ of service was an eye opener and lead to some gap analysis in the design stage.

This paper highlights the findings of an investigation of a failure of thermowell made from Monel material. Monel is highly resistant to chloride attack. But the thermowell still failed by extensive corrosion in a very short duration of two years. The failure is combination of galvanic action and then corrosive attack by iron chloride on Monel.

The paper discusses at length the conditions under which the Monel material had undergone aggravated corrosion and also discusses a few remedies.

Key words: Design flaw corrosion.
 

Product tags
Also Purchased
Picture for Failure of UNS N07750 Springs in Oxygen Scavenger Service
Available for download

51313-02217-Failure of UNS N07750 Springs in Oxygen Scavenger Service

Product Number: 51313-02217-SG
ISBN: 02217 2013 CP
Author: Abdul Razzaq Al-Shamari
Publication Date: 2013
$20.00
Picture for Chemical Compatibility of Composite Repairs in Refineries and Petrochemical Processing Facilities
Available for download

51313-02212-Chemical Compatibility of Composite Repairs in Refineries and Petrochemical Processing Facilities

Product Number: 51313-02212-SG
ISBN: 02212 2013 CP
Author: Larry Deaton
Publication Date: 2013
$20.00
Picture for Extending the Life of FGD Inlet Ducts with UNS N06059
Available for download

51313-02210-Extending the Life of FGD Inlet Ducts with UNS N06059

Product Number: 51313-02210-SG
ISBN: 02210 2013 CP
Author: Larry Paul
Publication Date: 2013
$20.00