000			01747nmc a2200169 4500
005			20260520010132.0
008			260224s xxu
245	0	0	_aCATHODIC DISBONDMENT IN HIGH PERFORMANCE COATINGS: EXPERIMENTAL AND NUMERICAL RESULTS
270			_a15/05/2009 ; 19/02/2007
300			_a10 p.
520			_aSegments of aged cathodic protected buried pipelines can be damaged as a consequence of soil movement, third-party-damage and corrosion processes. Therefore, high performance coatings have been applied when some replacement is necessary. Attention has to be taken to cathodic disbondment of these new coatings due to overprotection, especially in regions where the bed of anodes are located. If there is any failure in the replaced pipe section, exposing the metal substrate, it is believed that the current density in that region can be very high leading to serious damage in the coating. The aim of this investigation is to determine experimentally the behaviour of four different coatings, regarding cathodic disbondment. The cathodic protection system is assessed involving new and aged coatings. They are used as boundary condition to determine the potential distribution along the pipeline by means of numerical simulation. This assessment also aims determine the level of protection in the new segment of pipe and in the interface of aged and new coatings. It will be consider parameters such as physical-chemistry and corrosivity of soil.
942			_cCONGTP
100	1		_aFreitas, Denise S. de _937368
111	2		_aRio Oil & Gas (2006 sept. 11-14 : Rio de Janeiro, Brazil) _937349
999			_c166030 _d166030
856			_uhttps://biblioteca.iapg.org.ar/ArchivosAdjuntos/Oil&Gas_Rio_2006/IBP_1026.pdf