CASE STUDY

Ballast Tank Refurbishment – Crude Oil Tanker

Client: Shipmanagement Company

Industry: Marine

Scope: Ballast Tank Refurbishment

Date: August-September 2020

Location: China

Products: RS 500P

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OVERVIEW

Large areas of the ballast tanks on board a major crude oil tanker were suffering from severe corrosion.

These areas had to be repaired with a coating system which would provide long-lasting performance and protection from further corrosion.

CHALLENGE

In many of the tanks, the corroded spots were significant and often in hard-to-reach areas; making them difficult to prepare effectively ahead of coating application.

A coating solution which could be applied on a minimally prepared surface was required.

The project was carried out in high temperature conditions with exposure to high relative humidity.

SOLUTION

The surface was prepared using a combination of hydroblasting and mechanical power tooling, to WJ-3 and St 3 standards respectively.

One stripe coat and one full coat of Chemco’s solvent-free, wet & rust tolerant coating RS 500P was then applied to achieve a DFT of 200μm.

OUTCOME

The project was completed within the given timeframe, with all ballast tanks ready for a return to service.

BENEFITS

Solvent-free
• Wet & rust tolerant
• Can be applied on minimally prepared surfaces
• No humidity or dew point restrictions
• No recoating limitations
• No nearby operational shutdown required
• Quick return to service (product can ‘continue to cure’ underwater)
• Improved Health & Safety and reduced risk of Fire Hazard

tank internals showing severe rust

Original Conditions

tank internals with clean areas of patch rust

Ballast Tank After Surface Preparation

ank internals with clean areas of patch rust

Ballast Tank After Surface Preparation

tank internals with stripe coat of grey paint

Ballast Tank After Stripe Coat of
RS 500P

tank internals with stripe coat of grey paint

Ballast Tank After Stripe Coat of
RS 500P

tank internals painted in grey

Completed Application

tank internals painted in grey

Completed Application

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