CONSTANTA Ltd (general'nyy direktor)
Sankt-Peterburg, Russian Federation
Introduction. The article considers matters on ensuring entire nondestructive inspection of ship plating residual thickness with the use of Magnetic Flux Leakage (MFL) technique. The work aim is optimization of measuring transducers magnetic system parameters in order to guarantee the required sensitivity level at the plating thickness range of 3÷16 mm. Method. Physical and mathematical models of transducers were developed; the finite-element method was used for formulating the optimization criteria. Results. Dependences have been obtained that link tested thicknesses range and measurement error with magnetic system geometry and magnetization modes. The influence of nuisance parameters has also been studied. Conclusion. A set of measuring transducers for entire ship plating residual thickness measurements as well as techniques for adjustment and testing for pitting and planar corrosion detection have been developed as a result of this work.
magnetic inspection, MFL, corrosion, ship plating, ship-repairing
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