HOME The company The staff Structure Certifications Services Portfolio Contact us Metallic sandblasting Sandblasting is a mechanical process by which the most superficial part of a material is removed through the abrasion caused by a jet of sand and air. This treatment is mostly used for the surface cleaning of metals, however it can also be used for the engraving of inscriptions and images on marble and stones. Sandblasting is divided into 3 processing classes called Sa2, Sa2 1/2, Sa3. With Sa2 sandblasting, or “dusted”, the surface appears free of foreign residues, but of an uneven dark color. Sa21 / 2 sandblasting, also known as “commercial”, allows for a perfectly clean surface with a uniform color. Lastly, Sa3 sandblasting, also called "etching," releases the perfectly clean surface with multiple incisions of uniform color, which in some materials (for example iron), are shiny. Usually, in the mechanical field, sandblasting is part of an intermediate procedure to the product processing cycle and, only in rare cases, is it carried out as the last operation. The removed layer can be oxide, paint, calcification, galvanic or plastic coating, etc. At the end of the sandblasting, the material immediately under the removed layer is completely uncovered and has roughness related to the size of the grit used and the pressure of the jet. Sandblasting is therefore one of the preferred procedures for preparing the piece for subsequent painting. Sandblasting is carried out mostly on steel, cast iron, metal alloys in general, wood, ceramics, stone and marble, both for mechanical and industrial industrial use. The degree of sandblasting refers to the percentage of scale, rust, old paint, etc. to be removed during the sandblasting process. Generally the degrees of cleaning are: white metal sandblasting : consists in the complete removal of all corrosion products, all lamination scales , all traces of old paint and in general all impurities of the metal surface. The process produces a gray-white metallic surface with a uniform appearance, with such a roughness as to allow perfect anchoring of the protective paint layers that will subsequently be applied. almost white metal sandblasting : it consists in the almost total removal of all impurities from the metal surface (calamine, rust, dirt, old paint, etc.) with the exception of very light shading, very light veins or light discolouration caused by rust stains, oxides calamine or light adhering residues of paint or protective coatings. commercial sandblasting : refers to a good but not perfect sandblasting and, usually, practically requires the removal of all rust, calamine and other foreign materials on the surface of the metal. The surface obtained does not necessarily have to be uniform both as regards the degree of cleanliness and as regards the appearance and this is because any differences in the initial conditions of the surface affect the final result. The surfaces, however, have a very suitable roughness to give a firm adhesion of the paint layers that will be subsequently applied. The final appearance of the metal is grayish. coarse sandblasting ( or brushing ): consists in the removal of free rust, lamination and paint flakes , while those that are well adherent are left on the surface and such that the sandblasted surface can offer good adhesion and joint to the paint. According to the classification given by the Swedish standard SIS055900-1967 (still frequently in use) and repeated by the more current ISO8501-1, the various degrees of sandblasting are defined with the following abbreviations: white metal sandblasting : Sa3 almost white metal sandblasting : Sa2 1/2 or Sa2.5 commercial blasting : Sa2 coarse sandblasting : Sa1 REQUEST INFORMATION BY FILLING IN THE FORM BELOW NOW Compilando il form riceverai le informazioni dal nostro ufficio commerciale o tecnico Da compilare * campi obbligatori Nome:* Email:* Telefono:* Oggetto:* Messaggio:* Codice CAPTCHA:* CHI SIAMO RI-Me Srl è un’azienda leader nel trattamento termico, nella sabbiatura (metallica e al quarzo) e nella verniciatura (a polveri e a liquido) di oggetti di tutte le dimensioni. La sua ventennale esperienza le consente di poter essere oggi punto di riferimento e garanzia di qualità ed affidabilità nei servizi erogati. CONTATTI Offices Via della Meccanica, 1 35014 - Fontaniva (PD) Tel. 049-9420200 ra Fax 049-9420232 email: info@ri-me.net Via Campanello, 12 35014 San Giorgio in Brenta Di Fontaniva (PD) Copyright 2014 © Ri- Me Srl VAT number 04313070288 POPULAR POSTS This site uses cookies that help us deliver our services. By continuing to browse, you accept our use of cookies.OK Information