Launchpad, January - February 2006
For a full list of proposed, active and closed projects see here
Prevention of corrosion under insulation (CUI) of steel with TSA
To be launched; Spring 2006
Cost per sponsor: £25 000 pa, two payments
Project leader: Stuart Bond/David Harvey
CUI primarily affects carbon steel pipe work and other equipment. TSA (thermally sprayed aluminium) offers advantages over paint systems in terms of coating life and integrity and this would provide industry with significant savings if performance can be demonstrated. The scope of work is under development and we are keen to hear from interested parties to allow composition of the project outline for discussion at the launch meeting.
Thin clad corrosion - influence of dilution of CRA weld clad deposits on corrosion performance in realistic service media
To be launched; Spring 2006
Cost per sponsor: £30 000 pa, two payments
Project leader: Stuart Bond
Limits of dilution for Alloy 825 or 625 weld cladding are typically set based on data from ferric chloride (iron (III) chloride) tests. Single layer weld overlay may often provide adequate corrosion mitigation even though the iron dilution level is above the normally accepted limits. Therefore accidental over-machining of a double layer deposit, to expose the first layer, might not mean that a component is unsuitable for service. This project will enable assessment of the potential for operation of such components in a safe manner.
Assessment of ageing structures containing defects using non-destructive indentation technique
To be launched; March 2006
Cost per sponsor: £15 000
Project leader: Afshin Motarjemi
Instrumented indentation testing (IIT) provides a means of estimating materials properties (tensile properties, fracture toughness and surface residual stress), with no need to remove samples from plant or equipment destructively. Sponsors will benefit from TWI's independent validation of IIT by comparative destructive and non-destructive testing, to determine the reliability of IIT on welded ferritic and austenitic steels and aluminium and titanium alloy components. The project will include comparative assessments using both types of materials properties data to evaluate the benefits of IIT and provide sponsors with guidelines for their own use of IIT in defect assessment.
