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MTODOS MECNICOS EN PREPARACIN

DE SUPERFICIE NO CONVENCIONALES

REV/01

SISTEMAS

AMIG

ABLES

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FACTORES CLAVES EN PROTECCIN CON RECUBRIMIENTOS

SELECCIN ADECUADA DE:

MTODO DE PREPARACIN DE SUPERFICIE

ESPECIFICACIN DEL RECUBRIMIENTO

MTODO DE APLICACIN

CRITERIOS DE INSPECCIN

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PREPARACIN DE SUPERFICIE

QUE NOS FALTA SABER.

Omar Ivn Rivera Rey

Lnea de M/to y Marinas

Certified NACE 10505

orivera@pintuco.com

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QUE PASA AHORA EN LA PREPARACIN DE SUPERFICIE

El 75 % de las fallas de un sistema deproteccin con recubrimientos, son por una

preparacin de superficie no adecuada.

Se valora poco la preparacin y se le dejatoda la responsabilidad al recubrimiento

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POR QUE SE FALLA EN LA PREPARACIN?

FALTA CAPACITACIN DEL OPERARIO: NO TIENE CLARO EL POR QUE?... EL COMOY EL PARA QUE

NO SE CARACTERIZA EL SUSTRATO: SE ASUME QUE TODO SUSTRATO ES IGUAL

GENERALIZAMOS EL MTODO: NO VEMOS DIFERENCIAS NI ALTERNATIVAS

NO DEFINIMOS LOS PARMETROS DE CONTROL: POR FALTA DE CONOCIMIENTO

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PROTECCIN DEL ACERO

Componentes que afectan la proteccin

CALAMINA: par galvnico. SALES : blistering osmtico, corrosin ACEITES: adherencia, el recubrimiento. CONTAMINANTES: Qumicos (metal y concreto) POLVO: adherencia y poros

HERRUMBRE:corrosin PINTURAS VIEJAS: adherencia, compatibilidad HUMEDAD: Poros, corrosin, blistering

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MTODOS DE PREPARACIN DESUPERFICIE SEGN NORMAS NACE/SSPC

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PREPARACIN A METAL DESNUDONORMA SSPC SP11

reas que requieren una limpieza excelente conperfil de anclaje, donde no es posible utilizar

mtodos con chorro abrasivo.

Las herramientas mecnicas convencionales nologran la limpieza ptima y no dan perfil de rugosidadrequerido.

Usualmente se utiliza para reas no muy extensas

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SISTEMAS NO CONVENCIONALES PARA METALDESNUDO NORMA SP11

CEPILLO ABRASIVOBRISTLE BLASTER Y ROTO STRIP

PISTOLA DE AGUJASNEEDLE GUN

ESCARIFICADORA

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LIMPIEZA CON PISTOLA DE AGUJAS A SP11

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LIMPIEZA CON ESCARIFICADORA A SP11

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LIMPIEZA CON CEPILLO ABRASIVO A SP11

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VIDEO PSTOLA DE AGUJAS

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VIDEO ESCARIADORA SP11

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VIDEO MEDIDA PERFIL RUGOSIDADDESPUES DE ESCARIFICADO A SP11

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VIDEO BRISTLE BLASTER A SP11

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COMO TRABAJA BRISTLE BLASTER

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HOMOLOGACIONES Y/OCERTIFICACIONES

ECOPETROL: HOMOLOGACIN DE ESCARIADORA K7-1, MARCA AURAND TRATAMIENTO A SP11 ENPOLIDUCTO, ANO 2008, PGINA 10

TGI: HOMOLOGACIN DE ESCARIADORA K7-1, MARCA AURAND TRATAMIENTO A SP11 ENGASODUCTO, PROYECTO SPLO-GPR-1249-2011, PGINA 60

NACE 2009, MBX BRISTLE BLASTER, FUNDAMENTALS FOR REMOVING CORROSIVE LAYERSDOCUMENTO 09191.

NACE 2009, MBX BRISTLE BLASTING SURFACE PREPARATION METHOD FOR MAINTENANCE,DOCUMENTO 09004

NACE 2010, SURFACE PREPARATION OF SHIP CONSTRUCTION STEEL VIA BRISTLE BLASTERPROCESS, DOCUMENTO 10385