Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Cyclic CUI Testing of Insulation Materials

Picture for Cyclic CUI Testing of Insulation Materials
Available for download

Via the testing of six generically different insulation materials, the study has tried to identify factors in an insulation material that are more influential on corrosion rates of carbon steel.

 

Product Number: 51317--8877-SG
ISBN: 8877 2017 CP
Author: Soeren Rasmussen
Publication Date: 2017
Industry: Corrosion Monitoring and Control
$0.00
$20.00
$20.00

The role of the insulation material in relation to corrosion under insulation of carbon steel is normally assumed to be three-fold, providing:

a) An annular space or crevice for the retention of water and other corrosive media

b) A material that may wick or absorb water; and

c) A material that may contribute contaminants that increase the corrosion rate

Via the testing of six generically different insulation materials, the study has tried to identify factors in an insulation material that are more influential on corrosion rates of carbon steel.

The study has utilized the laboratory simulation method as outlined in ASTM G189-07 (Standard guide for Laboratory Simulation of Corrosion Under Insulation) that reproduces the condition where water reaches the interphase between insulation and steel, and the system is exposed to cyclic wet-dry/coldhot conditions.

In this test, higher corrosion rates were observed for closed cell and semi-closed cell insulation materials compared to fibrous and other materials that offered no resistance to water vapor diffusion.

Also, insulation materials with a higher content of leachable soluble salts (in particular Chloride) resulted in higher local (pit) corrosion rates.

Key words: CUI, Insulation, aerogel, calcium silicate, cellular glass, fiber glass, stone wool, Polyisocyanurate (PIR), water entrapment, chloride.

The role of the insulation material in relation to corrosion under insulation of carbon steel is normally assumed to be three-fold, providing:

a) An annular space or crevice for the retention of water and other corrosive media

b) A material that may wick or absorb water; and

c) A material that may contribute contaminants that increase the corrosion rate

Via the testing of six generically different insulation materials, the study has tried to identify factors in an insulation material that are more influential on corrosion rates of carbon steel.

The study has utilized the laboratory simulation method as outlined in ASTM G189-07 (Standard guide for Laboratory Simulation of Corrosion Under Insulation) that reproduces the condition where water reaches the interphase between insulation and steel, and the system is exposed to cyclic wet-dry/coldhot conditions.

In this test, higher corrosion rates were observed for closed cell and semi-closed cell insulation materials compared to fibrous and other materials that offered no resistance to water vapor diffusion.

Also, insulation materials with a higher content of leachable soluble salts (in particular Chloride) resulted in higher local (pit) corrosion rates.

Key words: CUI, Insulation, aerogel, calcium silicate, cellular glass, fiber glass, stone wool, Polyisocyanurate (PIR), water entrapment, chloride.

Product tags
Also Purchased
Picture for Understanding Insulation Chemistry Proven to Inhibit Corrosion Under Insulation (CUI)
Available for download

Understanding Insulation Chemistry Proven to Inhibit Corrosion Under Insulation (CUI)

Product Number: 51317--8876-SG
ISBN: 8876 2017 CP
Author: David Shong
Publication Date: 2017
$20.00

Since 2002, a corrosion inhibiting chemistry package has been an integral part of two specific industrial insulations. This paper explains, at a molecular level, how this package engages a two-pronged defense (physical coating and pH buffering) against CUI.
Picture for 08036 Evaluation of Steel and TSA Coating in a Corrosion Under Insulation (CUI) Environment
Available for download

08036 Evaluation of Steel and TSA Coating in a Corrosion Under Insulation (CUI) Environment

Product Number: 51300-08036-SG
ISBN: 08036 2008 CP
Author: Russell D. Kane, Monica M. Chauviere, and Keith Chustz
Publication Date: 2008
$20.00

A laboratory investigation of corrosion under insulation (CUI) using methods given in ASTM G189 for cyclic temperature, wet/dry conditions. Two long term exposure tests of three material conditions and two insulative materials (mineral wool and calcium silicate insulations).
Picture for Solution to Corrosion Under Insulation (CUI) with Three Layered CUI Control and CUI Warning Systems
Available for download

51314-4079-Solution to Corrosion Under Insulation (CUI) with Three Layered CUI Control and CUI Warning Systems

Product Number: 51314-4079-SG
ISBN: 4079 2014 CP
Author: Miki Funahashi
Publication Date: 2014
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support