Work Plan & Deliverables
6 work packages
WP1. Steel optimisation and manufacturing
Objectives:
- To define steel requirements for offshore fastener applications of metrics and grades equal and over M64 and 10.9 grade.
- To develop a suitable HSS grade 10.9 and 12.9 and its production route.
- To manufacture and provide industrial material for testing.
WP2. Steel Characterization and Selection
The main objective of this work package is:
- To select the most suitable steel composition more suitable for large size fasteners applied in aggressive environments.
To reach this objective, the following technical objectives will also need to be achieved:
- To characterise the steels obtained in WP1 (chemical composition, mechanical properties and metallography)
- To study the resistance to hydrogen embrittlement of the newly developed steels
- To study the differences of hydrogen trapping sites in each heat-treated steel
- D2.2 Identification of hydrogen absorption/desorption mechanisms of the optimized steels and analysis of their hydrogen embrittlement susceptibility under cathodic protection
- D2.3 Identification of hydrogen absorption/desorption mechanisms of the optimized steels and analysis of their hydrogen embrittlement susceptibility in atmospheric conditions
WP3. Coating performance and effects of environment on hydrogen embrittlement
Objectives:
- To develop coatings with expected maximal corrosion protection ability and minimal tendency to induce hydrogen formation on the steel surface and hydrogen embrittlement.
- To prepare series of high-strength steels samples coated with selected combinations of primers and topcoats with expected optimal performance.
- To characterise the coating microstructure and thickness.
- To test the coatings in view of corrosion resistance in simulated marine conditions and seawater exposure.
- To measure the effect of the coatings on hydrogen entry induced by corrosion processes into steel substrate in model seawater under cathodic protection and in simulated marine atmosphere, both on intact and defected surfaces.
- To study fundamental links between high-strength steels and coating composition and structure and hydrogen uptake.
- To assess the effect of corrosion-induced atomic hydrogen on the eventual loss of mechanical properties of coated high-strength steels under constant load and cyclic loading (fatigue corrosion) conditions.
- To select the optimal type, composition and structure of coating for protection of high-strength steels fasteners based on results of a systematic laboratory study.
- To better understand the interaction of environment, coating and steel substrate related to hydrogen embrittlement.
- D3.2 Corrosion resistance of coated high strength fasteners
- D3.3 Hydrogen embrittlement resistance of coated high strength steels
WP4. Bolts and Fasteners Manufacturing and Prototype Evaluation
The main objectives of this work package are:
- To establish the manufacturing route for M42 and M64 HV-bolts with the new coated HSS (PLUS) grades 10.9 and 12.9 following the standard DAST-021.
- To manufacture M42 and M64 HV-bolts with 10.9 and 12.9 PLUS steel grades with the new coatings following the standard DAST-021.
- To manufacture the reference bolts, i.e. hot-dip galvanized M42 and M64 HV-bolts with 10.9 PLUS steel grades following the standard DAST-021.
- To characterise the manufactured HV-bolts according to DAST-021 and ISO 898-1:2013 and special requirements of wind industry.
- To characterise the coated assemblies (bolts, nuts and washers) 10.9 in accordance to standard DAST-021.
- To characterise the coated assemblies 12.9 and to determine the friction coefficient.
- D4.1 Manufacturing and characterisation of 10.9 and 12.9 PLUS steel grade coated bolts and their assemblies
WP5. Component Validation in Real Environment
The main objectives of this work package are:
- To define the service conditions to be simulated for evaluation of full-scale components (HV-PLUS 10.9 and 12.9 coated bolts) (atmospheric and immersion zones).
- To design the adapted test beds for full-scale testing.
- To expose the systems and define the indicators for in-situ evaluations.
- To evaluate the performance of full-scale selected systems made in WP4 (e. g. coated bolting) in the defined simulated service conditions (natural seawater).
- To correlate the full-scale results with the laboratory results obtained in WP2 and WP3.
- To provide the simulated field results for guidelines.
- D5.1 Corrosion resistance of full-scale components in a real environment (atmospheric)
- D5.2 Corrosion resistance of full-scale components in a real environment (immersion under CP)
- D5.3 Guidelines for the offshore industry
WP6. Project coordination, dissemination and exploitation
The main objectives of this work package are:
- To coordinate the different work packages, and following up on the project outcomes vs. the plans, as well as with the European Commission.
- To organise and manage regular opportunities for the partners to meet and discuss (kickoff and periodic project progress meetings) about the content and the progress of the project.
- To support each partner with their obligations under this project (performance, time, cost) and to guarantee the successful on-time delivery of all project reports and other necessary documents (Technical and Financial reports).
- To promote project visibility by disseminating the project results to the scientific & industrial community, and to the public.
D6.1: Comprehensive overview of the project (State of the Art) – FULL PAPER
1 file(s) 807.06 KB
- D6.4: Report on Dissemination Activities
- D6.5: Publishable Report
