Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

Effect of Additional Water-Jet Cleaning on the Surface Cleanliness and Coating Performance

Effect of Additional Water-Jet Cleaning on the Surface Cleanliness and Coating Performance
Available for download

The objective of surface preparation is to create proper adhesion of a coating over the substrate. Proper surface preparation is vital to the long life and effectiveness of a coating applied in corrosive service. In some projects, the owners ask for the additional water jet cleaning prior to blasting work. 

Product Number: 51219-202-SG
Author: Heebaek Lee, Eunha Song
Publication Date: 2019
Industry: Coatings
$0.00
$20.00
$20.00

The objective of surface preparation is to create proper adhesion of a coating over the substrate. Proper surface preparation is vital to the long life and effectiveness of a coating applied in corrosive service. In some projects, the owners ask for the additional water jet cleaning prior to blasting work. The purpose of high-pressure water jet cleaning is to improve the corrosion resistance of the coating by removing oil or grease affecting coating quality, by preventing pH changes on the surface that may occur during solvent cleaning, and by managing the soluble salts to below 18mg/m2Cl-. But the process problems by water jet cleaning are removal of the residual waste water, process delays caused by adding drying process, freezing problems with the residual washing water in the winter period, and the costs of disposal of waste water. Therefore, it was required to optimize the surface treatment criteria by evaluating the coating performance and the surface cleanliness according to water jet cleaning. Surface cleanliness was evaluated by the surface pH variation, dust grade (ISO 8502-3), and soluble salts level (ISO 8502-6), and Coating performance was also evaluated by salt fog spray and condensation test in accordance with ISO 12944. The results show that the water jet cleaning prior to blasting does not affect the surface cleanliness and coating performance. Consequentially proper blasting surface treatment without water jet cleaning can give the required coating performance in the vessel and offshore structure.

The objective of surface preparation is to create proper adhesion of a coating over the substrate. Proper surface preparation is vital to the long life and effectiveness of a coating applied in corrosive service. In some projects, the owners ask for the additional water jet cleaning prior to blasting work. The purpose of high-pressure water jet cleaning is to improve the corrosion resistance of the coating by removing oil or grease affecting coating quality, by preventing pH changes on the surface that may occur during solvent cleaning, and by managing the soluble salts to below 18mg/m2Cl-. But the process problems by water jet cleaning are removal of the residual waste water, process delays caused by adding drying process, freezing problems with the residual washing water in the winter period, and the costs of disposal of waste water. Therefore, it was required to optimize the surface treatment criteria by evaluating the coating performance and the surface cleanliness according to water jet cleaning. Surface cleanliness was evaluated by the surface pH variation, dust grade (ISO 8502-3), and soluble salts level (ISO 8502-6), and Coating performance was also evaluated by salt fog spray and condensation test in accordance with ISO 12944. The results show that the water jet cleaning prior to blasting does not affect the surface cleanliness and coating performance. Consequentially proper blasting surface treatment without water jet cleaning can give the required coating performance in the vessel and offshore structure.

Product tags
Also Purchased
Durability Assessment of Foul-release Coatings
Available for download

Durability Assessment of Foul-release Coatings

Product Number: 41212-715-SG
Author: David Tordonato, Dr. Allen Skaja
Publication Date: 2012
$20.00

The Bureau of Reclamation (USBR) is currently investigating the feasibility of using foul-release coatings to mitigate impacts caused by macro-fouling organisms such as zebra and quagga mussels.  Durability of these coatings must be considered as a factor in determining overall life cycle costs.  To this end, the Bureau of Reclamation has developed testing protocols to evaluate the durability of foul-release coatings with respect to abrasion, erosion resistance and the ability to overcoat existing equipment.  
Don't Forget the Details When Specifying a Concrete Coating Project
Available for download

Don't Forget the Details When Specifying a Concrete Coating Project

Product Number: 51219-217-SG
Author: Sean Meracle, John Sierzega
Publication Date: 2019
$20.00

Many times, concrete coating projects are approached similarly to those of other paintable substrates, like steel or wood. The primary and sometimes only, focus is to provide a visibly clean and sound surface. More experienced design professionals will ensure that voids are filled, protrusions are ground to plane, and the correct surface profile is achieved. Once prepared, a serviceable coating system is applied (always as per the manufacturer’s recommendations) and no one looks back… unless there is a failure.
Picture for Coatings + Proceedings 2021-ALL Papers
Available for download

(Insulation & Corrosion) Surface Decontamination Significantly Reduces Vulnerability to CUI

Product Number: 20-COAT_DEC21
Author: Loren L. Hatle
Publication Date: 2021
$20.00

CUI (corrosion under insulation) is a pervasive, difficult and high-liability issue for petrochemical, power, shipping, and other industries. Situational variations (meteorological, geographical, seasonal, etc.) can confound conventionally specified surface preparation attempts to achieve perfect or near-perfect metal hygiene, thus reducing expected coating life by 30 to 75 percent. Because conventional surface preparation processes have historically been unable to adequately relieve microcontamination of metal surfaces, organizations have settled for an uneasy balance between economic and physical feasibilities that exclude the possibility of achieving ideal surface preparation outcomes and rely more heavily upon barrier coatings to supply needed corrosion control.
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