It’s a chemical process that alters the surface of the metal parts through the creation of phosphate crystals, chemically bonded to the substrate. The efficacy of this technique rely on the properties of these compounds that are able to improve the material resistance to the corrosion and facilitate the adhesion of the following painting processes.
Steel is the most common material in use today. However, it has a high corrosion rate and needs to be adequately protected by the electrochemical reaction of water, oxygen and other corrosive materials. (more…)
Screws are probably the most useful and versatile fasteners for woodworking. The reason of this popularity, most likely, lies in the reliability that wood screws offer in all different applications along with their relatively low price and availability in almost all hardware store.
What is more, the market offers a vast range of products that fit perfectly all the different tasks that need to be carried out, the heaviest as well.
The choice of the right product is not always easy and entails an adequate knowledge of all diverse features. (more…)
Hot dip galvanizing, due to his efficacy, is largely used to protect fasteners from oxidation.
The procedure consists in submerging the metal parts to be treated in a bath of molten zinc at a temperature of around 450 °C. Chemical products assure an adequate adherence of the zinc to the metal surface inhibiting the oxidation reactions during the process. (more…)
Washers are multipurpose fasteners that due their versatility are largely employed in the manufacturing, assembling and various other industrial sectors along with screws, nuts and bolts.
Even though washers are manufactured in large variety of shapes and dimensions, they consist of a thin plate disc with a hole in the middle which assures the tightening of threaded fasteners. (more…)
In this article, we’ll talk about steelwork structural bolts, how they’re categorised and what systems are available on the market.
Structural bolts have become essential after European standards EN 14399, EN 15048, and EN 1090-2 have become effective. (more…)
What is rust and metal corrosion?
Fastening elements are often used in chemical aggressive environment, where steel, without a suitable protection, it reacts with salts and acids, oxidizes and forms what is commonly known rust. (more…)
Chromium Plating
This kind of coating is applied both for protective and aesthetic purposes. Chrome plating provides similar corrosion resistance to zinc plating but gives an aesthetically pleasing appearance to fasteners as well.
The thickness of coatings ranges from 0.05 to 0.5 μm and is usually between 0.13 and 0.25 μm. (more…)
Socket screws (also referred to as Allen screws by the name of their inventor) appeared more than 100 years and since then they have been developed with different head types and shapes, always maintaining a relevant role in the fastening market due to their handiness and reliability.
Indeed, socket screws are provided with a hexagon recessed head which enables easy assemblies where there is not sufficient clearance for fastening tools.
Nuts, manufactured from various metals and plastic, are a type of fastener with a threaded hole. They are almost exclusively used to mate with a bolt that has the correct threading pattern.
The friction of the bolt and nut threads against one another creates a temporary joint that holds material together.
In Vipa nuts are available in different sizes and shapes for a wide range of purposes.
