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“Ceramic-Polymer SF/LF-SRB” for splash zone of CNOOC oil platform – coating with fouling blocker is suitable for offshore applications

09-18-2013 05:56 PM CET | Industry, Real Estate & Construction

Press release from: Ceramic Polymer GmbH

Ceramic Polymer coating for splash zone of offshore platform, CNOOC China

Ceramic Polymer coating for splash zone of offshore platform, CNOOC China

Recently, a huge offshore project was finished in China. The group CNOOC built a new oil platform. For the corrosion protection of the splash zone a high-quality coating from Ceramic Polymer GmbH was applied. This system is absolutely suitable for offshore applications and contains a new fouling blocker which reduces marine fouling effects considerably.

Project: New building of drilling platform, type WC13-6 (J275)

•Owner: CNOOC Ltd., Zhanjiang / China
•Engineering and construction of the platform: Shenzhen CSE, Shekou Shenzhen / China
•Application of the coating: Shen Zhen Yue Yang Company, Shenzhen / China
•Completion: August 2013
•Ceramic Polymer’s trade partner in China and technical guidance: GuangZhou Wwin Petrochemical Technology Co. Ltd., GuangZhou, PRC 510160

There is a high corrosion risk within the splash zone of offshore constructions. For the durable corrosion protection the coating product ”Ceramic-Polymer SF/LF-SRB” was applied directly on the steel substrate.

Product advantages and properties of ”Ceramic-Polymer SF/LF-SRB”:

•Excellent sea water resistance
•High abrasion resistance
•Fouling-blocking effect due to chemical integration of special biocide crystals –
Patent-No. WO2011/000339 A2
•Easiest application by airless spraying methods
•100 % solvent-free
•Simple to clean
•ISO 20340 – Performance requirements for protective coating systems for offshore and related structures.
•Fish acute toxicity test according to GB 18420.1+2-2009 – Chinese Standard
(these tests are explained in details below the project description)

Why is it necessary to protect the splash zone of the pillar construction with a suitable coating?

Within the intertidal zone and splash zone, the oxygen content of the sea water is increased due to currents and waves. Hence, the corrosion process is enormously accelerated by constantly moving water. In addition, severe mechanical abrasion results from flowing water. Therefore, it is essential to protect this section with a suitable coating system. Within the deep water sacrificial anodes usually provide an adequate cathodic protection against corrosion damages.

The SRB series of Ceramic Polymer GmbH: Limitation of fouling by specifically integrated biocide capsules!

The biocidal active component of this special product series is tightly encapsulated in the polymer matrix (patent pending method). Firstly, the coated surface is not antiseptically active and therefore physiologically harmless and environmentally safe. During strong bonding of marine organisms the special biocide capsules in the coating are activated and develop a local toxic effect. The protective coating is not being damaged by the ingress of the organisms. The fouling is being reduced and occurs just suficial. “Ceramic-Polymer SF/LF-SRB” provides a smooth and nonporous surface which can be cleaned easily and efficient with common equipment.

“Ceramic-Polymer SF/LF-SRB” fulfills Chinese Standard - Toxicity test according to GB 18420.1+2-2009

•Institute: South sea branch of National oceanic administration
•Coating of the test beaker: “Ceramic-Polymer SF/LF-SRB” – 1 layer, 500 µm
•Test fishes: Comb Gobies + Brine Shrimps
•Test method: Monitoring of 20 test fishes in 5 differently coated test beakers with 25 °C warm sea water. The test periods were 96 hours (Gobies) and 72 hours (Brine Shrimps).
•Result: The coating has no influence on the lifetime of the fishes and crustaceans. No hazardous substances are released into the water.

Offshore applications with Ceramic Polymer products -
4 coating systems passed extensive test according to ISO 20340!

One of the most important standards for offshore corrosion protection is the ISO 20340 (Performance requirements for protective paint systems for offshore and related structures).

The tested products

•Ceramic-Polymer SF/LF
•Ceramic-Polymer SF/LF-3
•Proguard CN 200
•Proguard CN 100 iso

Test procedure according to ISO 20340
25 week cycles (over 6 months!) as per following pattern:

•3 days of “simulated weathering”, i.e. UV radiation and condensation with water in 4-hour-runs
•3 days of permanent sprinkling with salt spray (5% sodium chloride solution) at 35 °C
•1 day extreme thermal shock in cold chamber at -20°C!

Only supremely resistant coating products can pass this demanding analysis. The “simulation of maritime weather conditions” with UV radiation, permanent humidity and the salt spray sets abnormally high requirements to the coating material. But the main difficulty is the extreme temperature shock. The remaining water freezes within the test scratch. In most cases it blasts off the edges of the coating.

The Ceramic Polymer coatings did not show any defects such as blistering, crack formation or flaking off. All 4 coating products provided excellent adhesion. No (!) corrosion creep at all occurred between the coating and the steel substrate. Excellent results were also achieved in specific “pull-off-tests” and “cathodic disbondment analyses”.

The Ceramic Polymer GmbH produces high-quality, solvent-free protective coatings for different kinds of industries. Due to the integration of microscopic ceramic and other special particles, coating systems with outstanding physical properties such as excellent chemical resistances, high temperature stabilities and extreme abrasion resistances are generated.
The Ceramic Polymer coatings are applied directly on the blasted substrate (e.g. steel, stainless steel, concrete) without the previous use of a primer. In this way extreme adhesion is achieved.
The scopes of the Ceramic Polymer coatings are for instance all kinds of storage tanks, pipelines or process vessels for the oil & gas industry as well as different maritime constructions, waste water or drinking water applications.

Ceramic Polymer GmbH
Stephanie Wuensch
Daimlerring 9
DE-32289 Roedinghausen
Phone: +49 (0)5223-96276-23

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