Thermodiffusion zinc coating

Thermodiffusion zinc coating consists in zinc diffusion from zinc powder blend into steel outer layer induced by the temperature and forming protective, corrosion-resistant surface.

Application of the coating by means of this method takes place in hermetically sealed container, put into the special furnace, which provides even, timed heating up of the details in special saturating mixture.

Zinc coating, received by thermodiffusion method satisfies the requirements of ASTM В633, ASTM В695, Britain standard BS 4921-1988 and GOST Р51163-98 of the Russian Federation.

Advantages of the thermodiffusion zinc coating technology:

• the coating has higher hardness, than other zinc coating and

possesses good abrasive resistance;

• the saturation temperature is respectively not too high, that's why the

coating can be applied on the workpiece of spring steels, and also on other prepared heat-treated workpieces;

• the process can be used for application of the coating on the

workpieces, received by powder technology method, on cellular bodies, and also on preassembled actuated parts and welded workpieces;

• allows to reach any thickness of the coating in the range from 5 to

120 micron according to the requirement of the Customer without changing the technological process;

• allows to cover hollow parts, pipes, fittings, threaded details, with

opened and closed holes, inner and outer sides of component details, as it doesn't change their geometry and doesn't give zinc build-up in the places of recesses or connecting threads;

• the coating perfectly imitates the contours of the workpieces,

homogeneously along the thickness on all the detail;

• corrosive resistance of the coating 3-5 times higher than electrolytic

coating, and 1,5-2 times higher than hot zinc coating while operation in industrial and marine atmosphere.

Orsk Construction Iron Plant provides services for thermodiffusion zinc coating of steel structures and pipes (certificate of compliance ROSS RU. AI95.H07420) for building complex, road-transport facilities, energy, communication, oil and gas, chemical and metallurgical sector, mining and transport industry, agriculture and communal services:

• pipes with diameter of 25-300 mm, length up to 6m;
• pipes with diameter of 75-300mm, length up to 12m;
• sort rolling of the profile 25-300mm, length up to 6 m;
• sort rolling of the profile 75-300mm, length up to 12 m;
• steel products, length up to 250 mm, weight up to 2 kg.