Page 81: of Maritime Reporter Magazine (November 2018)

New Antifouling Method for Workboats

Fouling has been a well-known prob- On the whole, 20 inspections have ventional silicon coating being tested special functionality of the ? lm. At this lem in the maritime industry for a long been carried out checking the ? lms for in direct comparison, was rated with a year´s SMM, Benito di Racca, owner of time. The most popular way of pre- any traces of barnacles, shells, algae or FR of 96 after the same period of time. the Lütt Deern and Managing Partner of venting fouling continues to be the use biofouling. The results are summed up in However, it shows barnacle fouling of H.S.H. Schleppgesellschaft mbH, shared biocide-based antifouling paints. When a so-called “Fouling Rating” (FR). On a barnacles (3 percent, size up to 6mm) as his experiences with the ? lm. ‘We use it comes into contact with seawater, scale from 1 to 100 (0 = full fouling; 100 well as scratches (1 percent), barnacle the ? lm since more than two years and the paint releases toxic biocides which = no fouling at all) the effectiveness of imprint (2 percent) and ? aking (1 per- we never had problems. When the boat prevent marine growth. However, with the ? lm is rated. cent) and a slight bio? lm (5 percent). was taken out of the water, there was biocides under the microscope, a new The last inspection was conducted on hardly any deposit build-up on the hull. way of thinking is required. An initial 14 June 2018. After approximately 36 Field Tests No fouling, no shells. For me, this means step was the worldwide prohibition of months by then, the RENOLIT DOL- In February 2016, the RENOLIT that the ? lm works.’ A further advantage antifouling coatings containing tributyl- PHIN S shows only a small amount of DOLPHIN S ? lm was applied to the of the ? lm: A part of the ? lm which was tin (TBT) in 2008. The new EU biocide barnacle seeds (1 percent) with a size of hull of the mooring boat Lütt Deern. In damaged in an accident in spring 2017 regulation was adopted in 2013, will set one millimeter. Apart from this, a slight October 2017, it had to be taken out of could easily be ? xed with small ? lm new standards. According to this regula- bio? lm (5 percent) is apparent. Overall, the water for repair work. It provided patches. tion all biocide-based products must be the ? lm is rated with a FR of 98. A con- the perfect opportunity to examine the www.renolit-maritime.com approved before entering the European market.

Only those products, whose substances have been authorized, will be approved.

Experts assume, that, when ? nally be- coming valid in 2019, the EU regulation will cause an increasing demand for al- ternative antifouling coatings. RENO-

LIT is a family-owned business, a manu- facturer of high-quality plastic ? lms.

The company developed a new product solving the problem of toxic antifouling coatings: the ? lm RENOLIT DOLPHIN

S. Based on the principle of fouling re- lease, this ? lm offers an alternative op- tion to conventional paints.

The biocide-free RENOLIT DOL-

Photo: Copyright RENOLIT

PHIN S is IMO-certi? ed and thereby complies with the IMO AFS Interna- tional Convention on the Harmful Anti-

Fouling Systems on Ship (2001).

Deck Handling Solutions for Tugboats

One of the ? lm´s unique features is the ability to turn the ship’s hull into an

Including Integrated Control Systems and Technical Support amphiphilic surface. Studies have shown that there are certain types of barnacles which primarily adhere to hydrophobic surfaces and other types which adhere primarily to hydrophilic surfaces. Previ- ous antifouling coatings based on sili- cone have only hydrophobic properties;

Therefore, they would solely prevent the adhesion of the barnacles adhering on hydrophobic surfaces. The RENO-

LIT DOLPHIN S ? lm combines these two properties and is thereby ‘amphi- philic’. Due to these attributes, marine organisms cannot entirely adhere to the ship’s hull and are simply washed off by the speed of the moving vessel (above 7 knots).

The Institute for Hygiene and Micro- biology (formerly LimnoMar) is investi-

Supplier of electric tow winch and tow pins for gating the long-term effects of the ? lms

M/V Caden Foss in direct comparison with other antifoul- ing coatings since more than three years.

International Workboat Show 2018

In July 2015, a PVC plate was prepared

November 28-30 with the RENOLIT DOLPHIN S and ex- www.macgregor.com www.rappmarine.com

Meet Rapp Marine & Triplex at Stand 1227 posed in the Port of Norderney. www.marinelink.com 81

MR #11 (74-81).indd 81 MR #11 (74-81).indd 81 11/6/2018 9:26:26 AM11/6/2018 9:26:26 AM