[article]
| Titre : |
Improving surface prep productivity with rectangular blasting nozzles |
| Type de document : |
texte imprimé |
| Auteurs : |
Chang-Hun Lee, Auteur ; Byeong-Hun Do, Auteur ; Won-Jun Yun, Auteur ; Han-Jin Bae, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 44-46 |
| Langues : |
Américain (ame) |
| Catégories : |
Buse (tuyère)
Métaux -- Surfaces
Traitement de surface par impact -- Appareils et matériels
|
| Index. décimale : |
667.6 Peintures |
| Résumé : |
The purpose of surface preparation is ultimately to achieve the necessary coating adhesion between steel and the coated film in order to protect the structure adequately for as long as possible. Adhesion is a significant factor regarding the suitability and lifespan of protective coatings in corrosive environments. In the shipbuilding industry, abrasive blasting is a common method of generating proper surface roughness and achieving high productivity'. Round nozzles are commonly used in abrasive blasting.
This article describes a study focused on the use of rectangular nozzles to achieve increased surface preparation productivity by avoiding concentrations of abrasive material typically seen with round nozzles. Rectangular nozzles can disperse abrasive material more evenly due to their shape. The rectangular nozzle used in this study is made of SKD-11 grade steel and has the same sectional area ratio as the reference rectangular nozzle used. The two nozzle types were compared regarding productivity and quality. Abrasive speed and spreading angle were compared using photos captured by a high-speed camera during Eaboratory scale testing. 1). Surface condition and profile achieved were compared using a microscope and quality of surface roughness in the field was assessed with measuring instruments.
Because of the round nozzle end, particles are concentrated in a small surface area. However, by changing the shape of nozzle from round to rectangular, particles can be discharged at a wider width for higher productivity. Also, a Venturi shape inside the nozzle can enhance particle velocity, which is the key element of surface cleanliness. |
| Note de contenu : |
- Rectangular ventury nozzle
- Equipment design and development : Comparison of performance using a high-speed camera
- Results and discussion : Comparison of velocity - Comparison of spray width - Comparison of work efficiency
- TABLES : Comparison of abrasive velocity of round and rectangular nozzles - 2. Comparison of shooting angle of round and rectangular nozzles - 3. Comparison of surface treatment area between round and rectangular nozzles according to carriage speed |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26838 |
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 5 (05/2016) . - p. 44-46
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