Inspectioneering
Inspectioneering Journal

Carbon Nano-Tube Epoxy Filler Improves Engineered Composite Repair System Performance

Continuously improving a critical component of a composite repair system greatly improves the system’s performance and value to the industry

By Matthew Green at Neptune Research, Inc.. This article appears in the January/February 2015 issue of Inspectioneering Journal

Introduction

Engineered Composite Repair (ECR) systems are moving into mainstream usage at a faster pace than ever. This increased usage and exposure is working to push them into new frontiers and commands a more demanding understanding of their basic functions. A fully inspectable ECR system was recently developed for use in high temperature environments (up to 300ºF, or 149ºC, continuous operating temperature). As a result, a new filler epoxy material needed to be developed that would retain its toughness and durability in this high temperature environment. Because the existing materials simply did not meet the needs of the industry in many situations, one had to be developed.

The challenge was to develop a high quality filler material that would be a fit to the high temperature ECR system and complement usage, while at the same time, improving the overall properties of the material and the system as a whole. Filler material (typically an epoxy-based resin) plays a vital (and varied) role within an ECR system and affects the overall effectiveness of the final repair.  It serves to provide an effective load transfer medium from the host pipe (in the defect region) to the composite wrap, thereby reducing the effective strain in the thinned pipe. It should provide an effective seal in the event of a through-wall hole in the defect area, while also serving as a corrosion coating where applied directly to the pipe. In general terms, these results are not overly difficult to achieve with many materials, but when you add the robust requirements to perform these functions at continuous temperatures up to 300 ºF (149 ºC), and to be compatible/resistant to a host of aggressive chemicals and processing conditions, it is much more difficult to achieve.

This content is available to registered users and subscribers

Register today to unlock this article for free.

Create your free account and get access to:

  • Unlock one premium article of your choosing per month
  • Exclusive online content, videos, and downloads
  • Insightful and actionable webinars
GET STARTED
Interested in unlimited access? VIEW OUR SUBSCRIPTION OPTIONS

Current subscribers and registered users can log in now.


Comments and Discussion

There are no comments yet.

Add a Comment

Please log in or register to participate in comments and discussions.


Inspectioneering Journal

Explore over 20 years of articles written by our team of subject matter experts.

Company Directory

Find relevant products, services, and technologies.

Job Postings

Discover job opportunities that match your skillset.

Case Studies

Learn from the experience of others in the industry.

Event Calendar

Find upcoming conferences, training sessions, online events, and more.

Industry News

Stay up-to-date with the latest inspection and asset integrity management news.

Blog

Read short articles and insights authored by industry experts.

Asset Intelligence Reports

Download brief primers on various asset integrity management topics.

Videos

Watch educational and informative videos directly related to your profession.

Expert Interviews

Inspectioneering's archive of interviews with industry subject matter experts.