rb bertomeu, S.L.

 Pol. Ind. Fondo de Llitera, Par. 82-83

E-22520 Fraga, Huesca (SPAIN) 

Tel. +34 974 47 48 04

+34 630 43 08 43



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The main cause of corrosion on exhaust valves in large engines running on fuel oil, and also on certain components of turbo-compressors, is that fuel oil contains specific metallic impurities, i.e., vanadium and sodium.
During the combustion of fuel oil in the engine, these impurities form various types of sodium vanadates that have a low melting point, and are therefore in a liquid state or semi-liquid state and are corrosive at the temperature of the gases in contact with the exhaust valves. Maximum corrosiveness occurs when the ratio of vanadium to sodium is 3, which corresponds to a vanadate with the lowest melting point (340-350ºC).

This cause of corrosion, accepted by practically all engine manufacturers, can be countered and prevented by means of treatment of the fuel oil with the additive “rb bertomeu” beco F1/ASF, which contains, among other components, organic magnesium. During combustion of the fuel oil, this substance forms magnesium vanadates, which are of a high melting point, in a solid state and non-corrosive. Throughout the last eight years, our clients have been able to verify that results obtained have provided satisfactory financial benefits.

For further information on this subject, consult the following documents compiled by rb bertomeu (by clicking on the chosen title):


- Deutz Engines approves the heavy fuel oil additive "rb bertomeu" beco F1/ASF.
- Study: RB-15 Notes on the causes of corrosion and solutions using fuel oil treated with the additive “rb bertomeu” beco F1/ASF.
- Study: RB-17 Summarised study of monitoring and reduction in corrosion on exhaust valves in DEUTZ engines, in several power plants.

Next you can find letters of reference from some of our customers who have corroborated the effectiveness of the additive "rb bertomeu" beco F1/ASF..


- Letter UFEFYS 26/06/2015
- Letter MYTA 17/06/2015
- Letter Paquito 02/02/2012
- Letter Unión Fenosa 26/09/2005
- Letter Coosur 15/09/2005
- Letter Coosur 21/05/2002
- Letter Olcesa 15/05/2002
- Letter DDR 04/04/2002
- Letter Artabra 15/02/2001
- Letter UFEFYS 30/01/2001
- Letter Calvo 26/01/2001
- Letter Intasa 20/01/2001
- Letter Cogeneración Bañeres 15/01/2001
- Letter Paquito 15/01/2001
- Letter Boinersa 10/01/2001
- Letter Cogemansa 10/01/2001
- Letter Calvo 01/02/1999
- Letter MYTA 25/01/1999
- Letter Cogeneración Bañeres 18/01/1999
- Letter Minera Santa Marta 01/08/1998
- Letter UFEFYS 24/10/1996
- Letter Cogeneración Electrica Ribera d'Ebre (CERE) 10/10/1996
- Letter Minera Santa Marta 18/09/1996
- Letter MASA Madrid 17/09/1996


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Manufacturer of additives for fuel oil and crude oil
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