2010 diagnosis numeral modeling and development of the cathodic protection refurbishung of the metal

Page 1

Paper No.

10393

--.".. .;..···í, '

~ .

~

®

· · ··~ NACE CORROSION 2010 I N

T ER N

A T ION A L

CONFERENCE & EXPO

DIAGNOSIS, NUMERICAL MODELlNG ANO DEVELOPMENT OF THE CATHODIC

PROTECTION REFURBISHING OF THE METAL SHEET PILlNG OF THE DOCKS OF

QUETZAL MARINE TERMINAL IN GUATEMALA

Lorenzo M. Martinez_dela_Esealera , Osear Alvarez , Jorge Canto , Hernan Rivera , Arturo Godoy, Hugo E. Ventura

Corrosion y Proteccion Ingeneria, S.C. Rio Nazas 6, Cuernavaca, Morelos. Mexico. 62290. Jorge A. Aseeneio, and Lorenzo Martínez

Instituto de Ciencias Físicas, Universidad Nacional Autonoma de Mexico, Universidad 1001 ,

Col. Chamilpa , Cuernavaca , Morelos. 62210. Also at Corrosion y Proteccion Ingenieria SC

ABSTRACT

This paper reports the refurbishing of the 1200 A cathodic protection (CP) system on a 2-mile

(3200 m) long , 100-foot (30.48m) deep steel sheet piling wall after 30 years service. Included

are the diagnosis of the sheet piling by underwater ultrasonic measurements; the analysis of

the performance of the mixed metal oxides (MMO) anode array along the docks; and the

effects of cable defects that exposed the copper sheathing to aggressive environments on the

anodic side of the circuit and rapid deterioration. The paper also reports the performance of the

high current rectifiers ; the replacement of the MMO anodes; the redesign of the anode

mountings; and , the wiring details of the anode connector cables and rectifier modifications.

The paper includes results of the tests of the CP current distribution in the wiring as well as the

return current from the protected structure to the rectifier. The status of the CP system

performance after the refurbishing is presented. The work included developing a numerical

model of the CP system as designed. The limitations of the original design are discussed in

view of all the metall ic structures involved, other than the steel sheet pilings, serving in

environments other than the main dock sea front.

KEY WORDS Cathodic Protection system, Steel Sheet Piling Wall.

©2010 by NA CE Intern ational. Requests for pe nni ssi on to pu blis h th is ma nu scri pt in any for m , in part or in whole. mU Sl be in writing to N ACE ln tern ational, Pu blica tions D iv is ion , 1440 So uth Creek Orive, Ho uston, Texas 77084. The mate n al present ed and th e vie ws expressed in th is paper are solely th ose aY lhe au th or(s) an d are no t necessaril y en dorsed by the Associatio n.


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.
2010 diagnosis numeral modeling and development of the cathodic protection refurbishung of the metal by Corrosión y Protección - Issuu