Duoguard Australia

Client – Port of Melbourne Corporation
Consultant – Infracorr Consulting
Contractor – Fitzgerald Constructions
Date -2012

Asset Description

Appleton Dock is located along the Yarra River in the Port of Melbourne in Victoria, Berths B&F were suffering from steel reinforcement corrosion due to exposure to high concentrations of chloride and moisture.

The Port of Melbourne Corporation needed to repair and strengthen Appleton Dock Berths B to F to provide an additional minimum 15 years’ service. The works included remediation of timber piles at Berths B to F and remediation of concrete elements including concrete piles and deck at Berths E to F.

Appleton Dock Berths B-E are leased and operated by Qube Ports Pty Ltd as part of a general cargo terminal, whilst Berth F is operated by Port of Melbourne Corporation.

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The Solution

The rehabilitation upgrade includes a detailed condition assessment of the concrete elements, diagnostic testing was performed with the intention of maintaining the concrete element and structure for a minimum 15 years. Galvanic anodes were the practical solution and installed adjacent to patch repairs. Access to the Dock soffit was via suspended scaffolding platforms to undertake corrosion control contract works.

The Benefits

Patchguard anodes were installed adjacent to all patch repairs, the purpose is to provide a cost-effective cathodic treatment to prevent the incipient anode effect to surrounding reinforcement. In excess of two thousand Patchguard anodes were installed to the concrete elements. When installed into concrete structures, and connected to the reinforcing steel, the unit will act as a sacrificial anode and prevent rebar corrosion within its sphere of influence.

The berths were subject to continuing operations, by both ships and yard vehicles, while the corrosion control solution was being installed.