FBE Coating

Sinter type epoxy (FBE) because of its excellent performance for a long time, has been as a single or double system independent of coating and multi-layer system of primer has been applied for more than 40 years, therefore become the standard of global pipeline anticorrosion coating material. Over the past decade, the oil and gas exploration through evolution and transport industry, the industry also constantly trying to delay the strategic and valuable assets such as pipeline corrosion, thus stimulating the new type fusion bonded epoxy (FBE) the development of anti-corrosion coatings. Sinter type epoxy (FBE) formula using solid epoxy resin; Under the condition of the proper proportion of solid epoxy resin, can make the FBE coating to achieve higher performance requirements, so as to cope with more severe challenge in the field use. Dow coating materials division (DCM) has been cooperating with customers and the industry organization, for high performance type fusion bonded epoxy (FBE) coatings development low cost solution. Dow coating materials are introduced in this group successfully developed and some solutions to the market.

For high glassy state transformation temperature FBE coating steel pipe special resin

Offshore oil and gas reservoirs in the harshest place on earth environment, because the new depth of oil reservoir were found from year to year, so more frequently to mining offshore oil and gas reservoirs. The interior department mineral service values, deep reservoirs may contain 50 billion barrels of oil in the gulf of Mexico, according to the current consumption of speed, the energy consumption of the equivalent of 7.5 years. On the depth of the ocean to put forward many drilling technology and material performance challenges. This perspective, from the most challenging thing is met high temperature - in general, the deeper the reservoir, oil or gas is more hot. From deep oil and gas reservoirs, by using the set of more than 140 ° C temperature oil (gas) pipeline from well be transported to the tension leg platform or single-column platform. Ordinary FBE coating cannot bear water, high pressure and high temperature work together for a long time. Only maintain a high working temperature, to avoid the formation of gas hydrate. For the pipeline, to avoid light paraffin condensation; Light paraffin condensation will restrict or hinder the flow of oil. Pipe coating enterprise by developing the advanced multilayer system, to maintain a high temperature; Multi-layer system not only make the pipe from corrosion, but also have the effect of thermal insulation layer, the pipeline is not affected by deep sea water or cold in the winter air temperature. This design is used to deal with extreme conditions of pipeline is called flow-through pipeline. For high temperature pipeline corrosion protection, the FBE coating of glass transition temperature (Tg) must be at least 5 ° C higher than the highest design temperature of pipe. In addition, FBE coating need to have enough flexibility, in order to avoid the use of pipe bending, coating fracture. Higher glass transition temperature (Tg) and good flexibility, the two features in conventional epoxy resin systems are often contradictory, that is, the higher the glass transition temperature (Tg), the flexibility of the coating is more poor. High glass transition temperature (Tg) is usually done by increase the crosslink density of polymer; Increase the crosslink density of polymer, will often reduce the flexibility of the coating. As a result, the challenges faced by our development team, in does not affect other key performance (for example: the storage stability and processability of FBE powder coating), break glass transition temperature (Tg) and reciprocal relationship between flexibility. In addition, after curing FBE coating steel pipe need to pass the appropriate thermal aging, to maintain its integrity in pipeline life period.

Pipe coating industries use most of the high glass transition temperature (Tg) coating systems, all need to use conventional spray or airless technology, painted for liquid; In addition, still must be high temperature curing, often need to coating layers, in order to achieve the predetermined thickness. This method is time consuming, and the coating is often a lack of flexibility. In view of these reasons, the conventional high glass transition temperature (Tg) coating is mainly used for coating of drilling pipe, injection pipe or shape relatively complex widgets (for example, fittings, flanges, valves, etc.). Polymer glass transition temperature (Tg) will be affected by the following several ways: improve crosslink density; Change the chain rigidity or molecular inter-atomic forces. The three variables (chain flexibility, molecular inter-atomic forces, crosslinking density) can be adjusted, so as to achieve the required balance between each performance. In order to speed up for high glass transition temperature (Tg) FBE the development of a new type of resin, we adopted patent a computer model to control the three variables, thus rapid screening of large amounts of structure. This kind of model considering factors include chain flexibility, molecular inter-atomic forces, and crosslink density. Conventional solid oligomer with glycerol ether bond, which has the inherent flexibility. Therefore, we use more rigid structures instead of solid glycerine ether bond of oligomer, rather than using substituent on the benzene ring.

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