Metal Spraying

In the North Sea first building, which was covered with a metallic coating, was specialized equipment offshore platforms, such as beams a signal flare, bridging the overlap between the platforms and stair replacement, which could not be safely replaced. This was followed by other remote sites, such as the lower platform and metal band splash of water that is too expensive to maintain. Now the whole platform, especially the part that pumps the gas, is protected through the use of this method. Among the platforms on which the applied electric arc spraying - platform deposits Troll, Conoco Heidrun, Murdoch in Norway. The minimum rate of adhesion of aluminum is 7.0 MPa, average - 12.0 MPa.

Terms of use cover - relative humidity (80% max), with min. air temperature and steel 100C. Application of thermal spraying (base and impregnation) requires more time than the process of applying four coats of paint in the use of equivalent resources. The reason is that the deposited metal longer applied to the surface, building managers should take this into account and added to their schedules for additional time. Design metal should be such as to provide free access to them and make metallizatsionogo gun spraying at the correct angle and close to the surface. On details such as the upper surface of the lower beams on the I-beam that supports the deck sleeves, attached to the console plate, flat bar and bimsovy very difficult, almost impossible to thermally sprayed.

During the deposition of aluminum, especially electrical arc method should be used cylindrical and rectangular hollow sections, as this constructive method to minimize the use of seclusion and closed plates / sheets. Process thermal spraying of aluminum requires automation of repetitive tasks, such as by spraying pipes and components, which do not require constant automatic reprogramming. Automating the process helps reduce operator fatigue and reduces the danger that this process is for the health and safety, and provides a smooth coating, economical metal layer. Although, the process Automation is not suitable for coating complex-shaped vessel and prefabricated steel frames. The basis for this paper is a report that was made at the Conference 'Corrosion 94', UK Institute of corrosion UK. Codes and standards relating to termonapylyaemomu aluminum Relevant codes and standards in Europe include the following: BS EN 22 063 Metallic and other inorganic coatings - Zinc, aluminum and their alloys BS 5493 Protective anticorrosion coatings for iron and steel structures. Handling, transport, storage and assembly of DIN 8566 part 1 and 2 additions for thermal spraying ISO 1463 Metallic and oxide coatings - Measurement of coating thickness - Microscopic method ISO 2063 Metallic coatings - Corrosion protection of iron and steel - Metal Spraying zinc, aluminum and their alloys ISO 2064 Metallic and other inorganic coatings - Definitions and symbols ISO 2176 Non-magnetic coatings on magnetic surfaces - Measurement of coating thickness - Magnetic method ISO 4624 Paints and varnishes - Testing of the coating on the adhesion strength and ISO 8501 1 - 4 Preparation of steel bases before applying paint and similar products - Characteristics of the surface roughness of steel bases after blasting NPD Guide corrosion protection equipment NS 476 Regulation approval the inspector handling the surface of NS 1975 Rules for approval of surface treatment equipment for SS 2626 Thermal spraying - Requirements and testing