31.10/2016
Metal-Expo Exhibition 2016
We’re glad to invite you to meet with our representatives at Metal-Expo Exhibition 2016, that will take place in Moscow, VDNKH, pavilion №75
18.10/2016
POLEMA DEVELOPS FOREIGN MARKETS
From 10th to 13th of October 2016 JSC POLEMA had taken part for the first time in World PM Congress and Exhibition...
03.06/2011
Progressive materials for multi-functional vacuum coatings
Application fields of materials for multi-functional vacuum coatings, characteristics of sputtering targets and evaporable sources used for technologies of physical deposition of hardening, protective, decorative and light-reflecting coatings, resistive, switching and transparent electro conductive films.
24.05/2011
Molybdenum and tungsten products for production of leucosapphires
POLEMA JSC is the leading global manufacturer of chromium, molybdenum, tungsten products, metal powders and composite materials.
Zink and Zn-Al for coatings
Use
A dependable method for protecting metallic structures made from carbonic and low-alloy steels from corrosion is to apply coatings of Zn-Al alloy to their surfaces. Thermal Zn-Al coating applied using AP-ZnAl16 powder effectively protects structures and equipment used in the atmosphere and in fresh- and saltwater. The servicable life of the coating depends on the thickness of layers applied and can reach into the tens of years.
This material is used to protect apparatuses, containers, reservoirs, pools, pipes, heat exchangers, bridges, hydraulic structures, power-industry equipment, vessel hulls, and other metallic structures from continuous and pitting corrosion. Powder expended in spraying onto metallic surfaces when creating a coating with a thickness of 200 microns is approximately 1.7-1.8 kg/m2. Handheld gas-fired torches or mechanized apparatuses are used for deposition.
Zink powder AP-Zn
Chemical composition, %
| Grade | Zn | Fe | Cu | Ti | Pb |
|
AP-Zn Gas-sprayed |
base | 0,1 max | 0,02 max | 0,02 max | 0,02 max |
Particle size (base fraction), microns:
- 0-40;
- 40-100;
- 50-160.
The powder can be prepared with other size requirements.
Powder of Zn-Al alloys AP-ZnAl16
Chemical composition, %
| Grade | Zn | Al | Fe | Cu | Ti | Pb |
|
AP-ZnAl16 Gas-sprayed |
base | 16 | 0,1 max | 0,02 max | 0,02 max | 0,02 max |
Particle size (base fraction), microns:
- -40 (45);
- 40-80, 40-160;
- 140-315.
