Bernd Schwegmann GmbH & Co. KG
Wernher-von-Braun-Str. 14
53501 Grafschaft-Gelsdorf
Tel +49 (0) 22 25 / 92 26 -0
Fax +49 (0) 22 25 / 92 26 -33
info@SchwegmannNet.de

SCHWEGO® inhibitor 6817

Corrosion protection additive / passivasion for residual rust on steel

 

Chemical base:   Mixture of organic substances
     
Properties:   SCHWEGO inhibitor 6817 is used to compensate poor preparation of the substrate and unsatisfactory painting conditions:

• Manual derusting (residues of rust / flash rust)
• Unfavourable weather conditions, e.g. damp surfaces
• Careless preparation of the substrate e.g. traces of grease
• Difficulties caused by type of construction or location, e.g. rest rust

SCHWEGO inhibitor 6817 converts residual rust into stable and non-corroding iron organic complex and provides long term protection against corrosion. SCHWEGO inhibitor 6817 ensures good penetration of the residual rust, thus adhesion is promoted. If SCHWEGO inhibitor 6817 is used as pre-treatment for corroded steel surface reaction time is about 3 hours. It is not necessary to wash the surface with water after reaction.

The effectivity of SCHWEGO inhibitor 6817 is observable by a blue to black discolouration of the substrate. After appereance of this discolouration the new coating layer can be applied.
     
Applications:   SCHWEGO inhibitor 6817 is primarily used undiluted as a pretreatment product against residual rust on iron and steel surfaces. SCHWEGO inhibitor 6817 is not a coating and therefore the treated surface must be protected by a suitable coating system. Painting should be carried out preferably within 48 hous after application of SCHWEGO inhibitor 6817. Types of paints and the number of coatings needed will be dertermined by the aggresiveness of the environment. SCHWEGO inhibitor 6817 is perfect for the restoration of all kinds of steel parts, for instance in the industrial sector, but also for machineries, vehicles and chemical-technical plant components. SCHWEGO inhibitor 6817 shows a very good solvent stability and is recoatable with must current coating systems.

SCHWEGO inhibitor 6817 is also used as a rust converting additive for water based coating systems. Typical applications are anticorrosive primers, one-coat anticorrosive systems and maintenance finishes.
     
Technical data:
(Guide values)
  Appearance : turbid, light-yellow liquid
Density (ISO 2811-1) : 0,89 g/cm³
Flashpoint (ISO 1523) : 21 °C
Non volatile content (ISO 3251): 7 %
     
Processing:   SCHWEGO inhibitor 6817 is used indiluted as a pretreatment product. The surface has to be prepared. Loose rust, fat, dirt as well as with rust infiltrated coating residues are to be removed by means of steel brush, grinding wheels etc. On the residual rust SCHWEGO inhibitor 6817 will be applied by the typical method like paint brush, roller and so on.

If SCHWEGO inhibitor 6817 is used in a coating the optimum dosage is between 3.0 - 5.0%, calculated on the system. The best incorporation of SCHWEGO inhibitor 6817 is after the pH-value adjustment of the paint. SCHWEGO inhibitor 6817 has an influence on the pH-value.

SCHWEGO inhibitor 6817 should be applied correctly onto the pretreated surface. In contact with remaining coating surfaces discolourations may occur. Hence, SCHWEGO inhibitor 6817 should be washed away with water or suitable solvents.

When using SCHWEGO inhibitor 6817 in a coating, yellow discolourations may occur and also drying time may increase. Therefore, siccatives should be adjusted. The use of SCHWEGO inhibitor 6817 in pastel coloured paints should be tested beforehand. To recoat a water based coat containing SCHWEGO inhibitor 6817 with solvent based coatings should be tested by laboratory trials.

To test the activity of SCHWEGO inhibitor 6817 it is necessary to use pre-rusted test panels and to carry out accelerated weathering. The salt spray test does not correlate with outdoor weatering and should not be used.

The spreading rate of purely applied SCHWEGO inhibitor 6817 is about 5 - 10 m². The spreading rate mostly depends on application method and the condition of the substrate.
     
Storage:   Do not store SCHWEGO inhibitor 6817 at temperatures below 0 °C. Stir it up before use. Keep it in a cool, well-ventilated place. Subjected to appropriate storage, the described properties of SCHWEGO inhibitor 6817 remain stable for at least 12 month, provided the original container is closed after use.
     
Packaging:   50 kg / 175 kg drum
     
     
    The above information is based on our current knowledge and experience. No binding assurance in respect of certain properties or suitability for certain applications must be read into our information. Patent rights and other proprietary rights must be observed if necessary. Further safety instructions please learn from our material safety data sheet.