S. B. Axelsen

Internal Stress in Polysiloxane Topcoats

Abstract This paper summarizes the results from laboratory investigations on internal stress in protective coatings. Internal stress, together with a lack of paint film flexibility and adhesion, ar...

Adhesion Properties of Polysiloxane Topcoats

Abstract This paper summarizes the results from laboratory investigations of the adhesion of polysiloxane topcoats. Low adhesion together with internal stress and lack of paint film flexibility and...

Protective Coatings Offshore: Introducing a Risk-Based Maintenance Management System—Part 2: Framework Establishment

Abstract This paper describes a risk-based maintenance management system for protective coatings and how it might influence offshore maintenance processes. Maintenance of protective coatings is one...

Mechanical Properties of Polysiloxane Topcoats

Abstract Results from laboratory and field investigations of the mechanical characteristics of protective coatings are summarized. Lack of paint film flexibility and strength, together with internal stress and low adhesion, are expected to be the main reasons for the cracking and flaking of protective coatings. Internal stresses were discussed in previous work, and adhesion will be discussed in the third and final paper of this series. Changes in mechanical properties from exposure offshore and from artificial aging in the laboratory have been studied. The individual coatings from two three-coat systems and two additional topcoats were included in the test program. The tested coatings were commercially available products and all topcoats were polysiloxanes. The tests have shown that there are significant differences in the mechanical characteristics of the polysiloxane topcoats, and that the impact of offshore exposure or weathering in the laboratory varies between the coatings. The internal stresses repo...

Protective Coatings Offshore: Introducing a Risk-Based Maintenance Management System—Part 1: Risk Analysis Methodology

Abstract This paper summarizes the risk analysis methodology and challenges related to the establishment of a risk-based maintenance management system for protective coatings. Maintenance of protective coatings offshore is demanding on resources and costly. Initial selection of a coating system and the quality of the application work, including surface preparation, are vital elements for securing an acceptable coating lifetime. Most offshore installations will require, however, maintenance of the protective coatings due to degradation and/or mechanical damages. Development and implementation of a maintenance program for coatings is therefore an essential part of the overall maintenance programfor these installations. A complete maintenance program development includes: 1) establishment of coating quality status through inspection, 2) preparation of a maintenance program/strategy, and 3) preparation of detailed maintenance plans and job packages/descriptions. Optimization of maintenance and inspection prog...

Protective Coatings Offshore: Introducing a Risk- Based Maintenance Management System—Part 3: A Case Study

Abstract This is the third and final paper in a series on risk-based coating maintenance. The paper discusses possibilities and limitations of the maintenance management methodology presented in Pa...