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

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

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

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

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. 

Product Number: 51220-295-SG
Author: Giri Venkiteela, Perumalsamy Balaguru
Publication Date: 2020
Industry: Coatings
$0.00
$20.00
$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. Growth of corrosion from a location where the coating is damaged, thinning of coating, color changes and influence of weld and bolt holes were the parameters used for evaluating the performance of the coatings. The major differences between the proposed method and the current practice are: a circular shaped scribe for creating artificial damage instead of X shape, use of adhesion strength of the coating to obtain corrosion-creep growth at various stages of corrosion and addition of deep-freezing cycle as part of accelerated corrosion to enhance creep growth. The adhesion strengths are much easier to measure as compared to measuring few millimetres of creep growth that are typically fuzzy. The proposed test method was evaluated by comparing the performance of 6 coating systems. These 6 systems were chosen using the results of a 20 -year field study, in which, 2 coatings provided very good corrosion protection while 2 others were found to be very weak. The results show that the proposed protocol provides clear difference between strong and weak coatings and simulates the field behavior well.

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. Growth of corrosion from a location where the coating is damaged, thinning of coating, color changes and influence of weld and bolt holes were the parameters used for evaluating the performance of the coatings. The major differences between the proposed method and the current practice are: a circular shaped scribe for creating artificial damage instead of X shape, use of adhesion strength of the coating to obtain corrosion-creep growth at various stages of corrosion and addition of deep-freezing cycle as part of accelerated corrosion to enhance creep growth. The adhesion strengths are much easier to measure as compared to measuring few millimetres of creep growth that are typically fuzzy. The proposed test method was evaluated by comparing the performance of 6 coating systems. These 6 systems were chosen using the results of a 20 -year field study, in which, 2 coatings provided very good corrosion protection while 2 others were found to be very weak. The results show that the proposed protocol provides clear difference between strong and weak coatings and simulates the field behavior well.

Product tags
Also Purchased
A New Film Thickness Gage With Built-in Temperature and Humidity Measurement
Available for download

A New Film Thickness Gage With Built-in Temperature and Humidity Measurement

Product Number: 51220-293-SG
Author: Rick Trawick
Publication Date: 2020
$20.00

Currently, Ships’ Force (SF) conduct maintenance and repair painting during pier-side periods as well as while ships are underway. SF commonly use epoxy primers, such as MIL-DTL-24441, Type IV, for maintenance painting and in some cases, chloride contamination and surface profile is not adequately controlled. The Naval Research Laboratory (NRL) conducted a study to verify the efficacy of replacing the current epoxy primers commonly used by SF with more “user friendly” high-build, high-solid primers. 
Analysis of Coating Blister Failures and Associated Coating and Substrate Risks
Available for download

Analysis of Coating Blister Failures and Associated Coating and Substrate Risks

Product Number: 51220-254-SG
Author: Michael Kibler, Patrick Cassidy, Jay Ong
Publication Date: 2020
$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. 
A Viable Alternative to Mineral Abrasive
Available for download

A Viable Alternative to Mineral Abrasive

Product Number: 51220-263-SG
Author: Joe McGreal
Publication Date: 2020
$20.00

Mineral abrasives such as glass bead and aluminum oxide have been traditionally used in the surface finishing industry. The general perception is that they offer acceptable cleaning at a low operating cost. Often dismissed is the potential of metallic alternatives that though seemingly higher in initial procurement cost, offer several differentiating advantages in terms of recyclability, consistency of finish, repeatable results and ultimately resulting in overall, reduced operating costs. 
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