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ORACLE : RELIABILITY SUPPORT SYSTEM FOR METALLIC COMPONENTS SUSCEPTIBLE TO CORROSION-RELATED CRACKING

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A comprehensive modular software system was developed covering a wide range of aspects of cracking corrosion prevention and analysis related to several combinations of materials and environments.
The system developed is rather innovative and more complete regarding other systems related to Corrosion prevention. The main aspects to point out are:
Integration in a unique system of various pieces of knowledge.
Development of a corrosion simulator capable to quantify or give qualitative assessment of corrosion risks.
Openness of the system: The system is almost fully open allowing to the user to create and program his own rules of assessment or quantification of corrosion risk, through neural networks analysis or rule-based expert systems; to store his own design rules, specification or standards; to record his own failure case histories in a very comprehensive and systematic ATLAS of Case Histories.
In conclusion, the project has been successful in achieving its principal objective of providing a Corrosion and Materials Advisor to improve the assessment of corrosion-related cracking risks and to enhance design and maintenance practices in process industries and power plants. The applicability and benefits of the developed system have been demonstrated through a number of realistic examples.
The proposed research is directed at developing an (off-line) automatic Corrosion & Materials Advisor for improved design and maintenance in chemical industries and power plants. The project addresses the problems of corrosion-related cracking of components in various process and power plants (chemical plants, refineries, nuclear and conventional power stations - new ones and those already in operation). The proposed computerised support tool :

1. will be a CORROSION SIMULATOR, allowing the user to analyse different what-if scenarios when changing process or other conditions;

2. will be able to act as an INTELLIGENT INFORMATION BANK guiding the user on how to reduce the risks, and allowing him to access necessary background information. The results of the proposed research should provide help, i.e. enhance the existing engineering solutions, at three main levels :

- in design optimisation;
- in safety analysis;
- in failure analysis. The solution for the problem would imply completion of the following R&D trasks:

1. Structuring and analysing knowledge already available (case histories, construction rules, standards, data sets, etc.) in order to derive corrosion cracking models;

2. Performing some additional testing in specific target sub-areas;

3. Customising appropriate knowledge engineering methods and tools for task, including the use of expert system, hypermedia and neural network technologies;

4. Integration of the results into a single engineering system.

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INST DE SOLDADURA E QUALIDADE
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CABANAS-LEIAO (TAGUSPARK) ESTRADA NACIONAL 249-KM3
2781 OEIRAS
Portugal

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