بررسی محافظت از لوله ی انتقال نفت و گاز در مقابل خوردگی با استفاده از پوشش های پلی اوره تان

چکیده

امروزه از رنگ هاي پلي اورتان براي پوشش دهي انواع لوله هاي فولادي جهت صنايع نفت، گاز، پتروشيمي، انتقال آب و ساير صنايع استفاده مي شود. پوشش پلي اورتان با جامد % ۱۰۰به عنوان يکي از بهترين انواع مواد محافظ به شمار مي رود. در ايـن مقالـه خواص فيزيکي و مکانيکي اين ماده، مانند چسبندگي روي فولاد، اسـتحکام کشـشي، نـشت پـذيري، مقاومـت بـه ضـربه و غيـره هنگامي که اين ماده به عنوان پوشش محافظ استفاده مي شود، طبق استانداردهاي معتبر اندازه گيري و با خواص ساير پوشش هـاي مق متداول ايسه شده است. ضمنا” بصورت تفصيلی نحوه اعمال پوشش پلی اورتان %۱۰۰جامد بر بدنه داخلی و خـارجی لولـه هـا در کنار ارزيابی اقتصادی مورد بررسی قرار گرفته است. نتايج نشان داد که پوشش پلي اورتان با جامد % ۱۰۰خـواص بهتـري نـسبت بـه ساير پوشش ها دارد و مقاومت به خوردگي آن در اکثر محيط هاي خورنده بالا مي باشد بطوريکه استفاده از ايـن پوشـش در اکثـر موارد توصيه مي شود.

ABSTRACT

Today polyurethane paints are used to cover all types of steel pipes for oil, gas, petrochemical, water transfer and other industries. The 100% solid polyurethane coating is considered as one of the best types of protective materials. In this paper, the physical and mechanical properties of this material, such as steel bonding, tensile strength, leakage, impact resistance, etc., when used as protective coating, are measured according to valid standards and with properties of other coatings. Is commonly used. Meanwhile, in detail, how to apply a 100% solid polyurethane coating on the inner and outer body of the pipes along with the economic assessment, the results showed that the polyurethane coating with 100% solid has better properties than the other coatings, and the corrosion resistance It is high in most corrosive environments, so the use of this coating is recommended in most cases.

INTRDUCTION

Polyurethane coating as a polymeric material that is now being replaced in its entirety instead of polyethylene has many advantages, such as excellent mechanical and chemical properties. Polyurethane coatings with solid (100% soluble or 100% solids of these coatings indicate that no solvent is used during construction or at the time of application). An important member of the large family is polyurethane coatings. . Otto Bayer and their colleagues discovered polyurethane and polyurethane coatings. From 1930 to the present day, this material has progressed a lot. Today, many coatings of polyurethane compounds are available as single-component and two-component. Polyurethane coatings with a solid of 100% are two-component coatings, one of which is polyol and the other component poly isocyanate. This material is classified in the hard material category 1. Polyurethane coatings are classified according to ASTM D-16 standard into six main groups. Polyurethane coatings with 100% solids in this classification are part of the fifth type. Due to good mechanical strength, excellent chemical resistance and high adhesion to various metal and non-metallic surfaces, these coatings are excellent coatings for internal and external surfaces of gas pipes, crude oils, petroleum compounds, drinking water, sewage, six External pockets are buried pipes under or under the sea, internal coatings of oil, gas tanks, sewage treatment ponds, chemical storage tanks and others.

Year : 2007

Publisher: Oyster coating plants

By :  Ali Mabodifar 

File Information : Persian Language / 12 Page/ Size :  248 KB

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سال : 1386

ناشر : كارخانجات پوشش دهي صدف

کاری از : علی معبدی فر