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

Analysis of Coating Blister Failures and Associated Coating and Substrate Risks

Analysis of Coating Blister Failures and Associated Coating and Substrate Risks
Available for download

Blistering is a common failure in marine coatings that can be caused by both physical, such as osmotic pressure and temperature gradients, and electrochemical forces like cathodic or anodic polarization. This paper/presentation will start by discussing the various mechanisms that lead to coating blistering, how blisters form, and how to prevent them. 

Product Number: 51220-254-SG
Author: Michael Kibler, Patrick Cassidy, Jay Ong
Publication Date: 2020
Industry: Coatings
$0.00
$20.00
$20.00

Blistering is a common failure in marine coatings that can be caused by both physical, such as osmotic pressure and temperature gradients, and electrochemical forces like cathodic or anodic polarization. This paper/presentation will start by discussing the various mechanisms that lead to coating blistering, how blisters form, and how to prevent them. Next, the effects of blistering on coating performance and corrosion of the underlying substrate were investigated through creating blisters on coated test panels and inspecting them for coating failure and pitting corrosion after exposure. Additionally, several ship tanks were inspected for blistering before and after one to three-year service intervals. The inspection results showed a significant number of blisters broke in the time between inspections, typically forming cracks or pinholes through the coating. Performance of blisters from tank to tank varied, suggesting service type and time of wetness may play a role in the risk of blisters breaking. Blisters seen in varying services may form due to different mechanisms as well. Pitting corrosion measurements on the lab panels showed intact blisters do not provide adequate corrosion protection to the underlying steel in all cases, depending on the service and blistering mechanism. The data suggests an intact blistered coating is not equivalent to a boldly exposed, corroding substrate, but it is also not equivalent to a tightly adherent, intact coating.

Blistering is a common failure in marine coatings that can be caused by both physical, such as osmotic pressure and temperature gradients, and electrochemical forces like cathodic or anodic polarization. This paper/presentation will start by discussing the various mechanisms that lead to coating blistering, how blisters form, and how to prevent them. Next, the effects of blistering on coating performance and corrosion of the underlying substrate were investigated through creating blisters on coated test panels and inspecting them for coating failure and pitting corrosion after exposure. Additionally, several ship tanks were inspected for blistering before and after one to three-year service intervals. The inspection results showed a significant number of blisters broke in the time between inspections, typically forming cracks or pinholes through the coating. Performance of blisters from tank to tank varied, suggesting service type and time of wetness may play a role in the risk of blisters breaking. Blisters seen in varying services may form due to different mechanisms as well. Pitting corrosion measurements on the lab panels showed intact blisters do not provide adequate corrosion protection to the underlying steel in all cases, depending on the service and blistering mechanism. The data suggests an intact blistered coating is not equivalent to a boldly exposed, corroding substrate, but it is also not equivalent to a tightly adherent, intact coating.

Product tags
Also Purchased
A New Protocol for Evaluating the Effectiveness of Coatings Used to Reduce Corrosion of Steel Structures
Available for download

A New Protocol for Evaluating the Effectiveness of Coatings Used to Reduce Corrosion of Steel Structures

Product Number: 51220-295-SG
Author: Giri Venkiteela, Perumalsamy Balaguru
Publication Date: 2020
$20.00

Details of a new protocol for evaluating the effectiveness of coatings to reduce corrosion of steel structures is presented in this paper. Basic concepts of accelerated testing specified in American Society for Testing Materials (ASTM) standards and recent research investigations were used to develop a procedure that can provide conclusive results within 2400 hours of exposure as compared to more than 5000 hours in current practices. 
Effect of Surface Conditioning on Corrosion Resistance Using New Vs. Traditional Abrasive Blasting Media Types
Available for download

Effect of Surface Conditioning on Corrosion Resistance Using New Vs. Traditional Abrasive Blasting Media Types

Product Number: 51220-291-SG
Author: Wesley S. Towle, Paul W. Rehrig, Ed R. Reitz, Rafi M. Herskovits
Publication Date: 2020
$20.00

Surface conditioning is the first step in building efficient corrosion protection on a part or structure. Key concerns during this step include, how to create a stronger anchor-profile and how to efficiently remove previously coated, damaged, or corroded elements from a materials surface prior to coating. The ideal solution must consider three areas of the surface conditioning process: finish quality, cleaning efficiency and total cost. 
Picture for Coatings + Proceedings 2021-ALL Papers

(Coating Application, Types & Characteristics) Use of Duplex Coating Systems for Protection of Structural Steel

Product Number: 15-COAT_DEC21
Author: William D. Corbett
Publication Date: 2021
$20.00

The use of duplex coating systems (hot dip galvanizing or thermal spray coating with one or more liquid-applied coatings) for long term protection of structural steel is becoming more mainstream in many industries. This paper describes the advantages of employing duplex coating systems as well as some important considerations for designers prior to specifying their use. It also highlights an ongoing initiative to help agencies more efficiently and effectively use duplex coatings on steel bridges by developing guidelines, standards, and other materials.
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