Technical Product Information

Skippers CORRPASSIV^TM

Underwater and Above-Water Corrosion Protection for Steel Boats

Skippers CORRPASSIV^TM consists of two principal components:

1. BASE PRIMER

• Contains the world's first Organic Metal ORMECON, which activates two protective mechanisms on direct contact with other metals:
• Ennobles the surface by modifying its corrosion potential
• Passivates the metal surface by forming a stable oxide layer (Fe₂O₃)

 

2. INTER PRIMER

• A two-component intermediate epoxy primer matched to the BASE PRIMER, with the following functions:

- Barrier function

- Provides a good adherend surface for further coats, depending on the application

 

Advantages over conventional systems:

• New protective principle ennobles and passivates the substrate surface without heavy metals (ORMECON^TM is an organic substance)
• Full anti-corrosive effect of BASE PRIMER is achieved at only 20 µm dry film thickness
• Very good edge protection properties
• Protective effect maintained even in cases of localised paint-film damage up to 2 mm across

 

Examples of applications:

Skippers CORRPASSIV^TM is ideal for total repainting of steel hulls. The individual coats are applied in the same way as conventional systems. BASE PRIMER and INTER PRIMER provide a very good substrate for top coats. These may be antifouling paints for underwater applications, while commercially available two-component PU finishes are suitable for above-water use.

Partial repairs or treatments (e.g. touching-up or keel painting) are another field of application for Skippers CORRPASSIV^TM.

Tests and Results:

1. Alternating immersion test in accordance with DIN 50 905 T4 
   (seawater) 

Duration: 4 months	Rusting	Blistering	Tunnelling
Skippers CORRPASSIVTM	none	none	none
Standard system A	slight traces of rust along damage site	none	1 - 3 mm
Standard system B	uneven rust along damage site	m3 / g5*	2 - 5 mm

*Blistering in accordance with DIN 53 209

 

2. Continuous immersion test in accordance with DIN 50 905 T4
   (seawater)

Duration: 6 months	Tunnelling	Blistering	Rust spots
Skippers CORRPASSIVTM	none	none	none
Standard system A	2 mm	none	isolated 2 - 5 mm
Standard system B	total detachment	total detachment	widespread rust

These tables give a concise summary of the results of two accelerated corrosion tests conducted at our research facilities. They make it clear that a substantial improvement in corrosion protection can be achieved with the Organic Noble Metal ORMECON.

Our findings are also confirmed by studies of the anti-corrosive effect of the BASE PRIMER conducted by independent institutes:

- Forschungsinstitut für Pigmente und Lacke, Stuttgart (Pigments and Paints Research Institute)
- Dechema e.V., Frankfurt

 

An example of the use of Skippers CORRPASSIV^TM as a repair system for cast steel keels (see also the test report from Iceland):

Cast steel keels almost invariably present boat owners with major corrosion control problems. After only short periods of exposure, even relatively new keels tend to display blistering followed by heavy blooming of the corrosion products under the coating. Delamination is the inevitable result.

Proof that Skippers CORRPASSIVTM is an ideal corrosion protection system for dealing with this problem can be seen in the following photographs.

Fig. 1: Port side, treated using conventional method

To make a comparison between a conventional keel coating and Skippers CORRPASSIV^TM , the port side of the keel was treated using a conventional method.

The starboard side was treated with Skippers CORRPASSIV^TM . After only one season in the Baltic Sea, the following picture emerged:

Port: Isolated blooming of small rust clusters Isolated very heavy voluminous rust, clearly visible in Fig. 2. Lifting of complete top coat by corrosion products. Creep corrosion under top coat, spreading from injury sites.	Fig. 2: Close-up of port side
Starboard: No delamination No creep corrosion No traces of rust	Fig. 3: Starboard side, treated with Skippers CORRPASSIVTM
Even at the site of mechanical damage to the top coat (large areas of antifouling paint flaked off) there is no visible trace of rust (Fig. 4).	Fig. 4: Close-up of starboard side

Further Information:

For further product information, price lists for various ORMECON products and scientific publications, please call:

 

Ormecon Chemie GmbH & Co. KG
A Subsidiary of Zipperling Kessler & Co. (GmbH & Co.) - Ferdinand-Harten-Str. 7, D-22949 Ammersbek, phone: +49-40-604 106-0, fax: +49-40-604 106-51
our server in the internet with most detailed information: http://www.ormecon.de/

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