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Anaerobic adhesives or anaerobic adhesives are a very specific group of preparations, intended for use in joining mainly metal surfaces. Anaerobic adhesives react when in contact with metal, which is their catalyst. They harden when the air supply is eliminated, while maintaining the appropriate temperature and the size of the gap used.
Anaerobic adhesives are designed to protect threaded connections against unscrewing, to seal threaded connections, to protect metal elements against vibrations. Anaerobic products also allow filling gaps between adjacent metal surfaces, ensuring high resistance of the joint against external factors. Anaerobic adhesives are also used for fixing pipe connections, for screw-nut connections, guaranteeing high strength of the joined elements.
Does the glued material matter?
Anaerobic adhesives used in the broadly understood industry, harden on all metal surfaces, but this is very much influenced by the so-called. activity of the bonded material. The curing time of an anaerobic adhesive depends not only on the temperature and thickness of the joint, but also on the material used. Depending on the type of material, whether it is active or passive, anaerobic adhesives cure within a few minutes or even several hours. Passive materials have poor catalytic properties and an activator is required for faster curing of the anaerobic adhesive. In the case of active materials, the product cures quickly, a permanent bond is formed, without the need to use an activator.
Specific anaerobic adhesive for specific material
Anaerobic adhesives are mainly intended for joining various metal materials. However, not all materials will be glued in the same way. Anaerobic adhesives differ in composition, which allows for the creation of durable connections with various parameters. The use of anaerobic adhesives dedicated to specific materials guarantees high strength of the joint, but also allows for possible disassembly of the joint and even maintaining the highest chemical resistance of the joint. Anaerobic adhesives cure on contact with metals such as stainless steel, iron, copper and aluminum and with some plastics such as PVC, PTFE and nylon. The material from which the components are made affects the curing speed of the anaerobic adhesive. For example, when bonding stainless steel, the cure of an anaerobic adhesive may be slower than when bonding iron. Therefore, it is important to choose the right adhesive that is suitable for the specific material and will provide optimal performance.
A good anaerobic adhesive - which product to choose?
Active materials such as copper and iron react chemically with the anaerobic adhesive, which means that they are very susceptible to the curing of anaerobic adhesives. With active materials, the anaerobic adhesive will begin to cure immediately after application, meaning they require less curing time.
Manufacturers of anaerobic adhesives offer a wide range of products for bonding both active and passive materials. Typically, anaerobic adhesives can be used to bond all metal materials, the only difference being that some will stick together faster and others slower.
Loctite offers an all-purpose anaerobic adhesive for virtually all types of metal. Loctite 243, because we are talking about it, is a preparation that protects threaded connections against unscrewing and seals threaded connections. Loctite is resistant to high temperatures and chemicals, prevents corrosion and is suitable for connections that require subsequent disassembly.
Another anaerobic adhesive for metal assembly is Loctite 2701. Like Loctite 243, this formulation seals threads, prevents loosening of screws, and its fluorescent properties help control the bonding process. Perfect for joining passive materials, e.g. chrome surfaces.
If you want to bond active materials but the adhesive cannot cure quickly, Loctite 573 anaerobic sealant can be used. This anaerobic sealant is ideal for gluing large, rigid flat surfaces, which can take several hours to install. This Loctite product cures slowly and provides an excellent seal between flat surfaces in the absence of oxygen between close-fitting materials.
Passive materials such as stainless steel and aluminum do not react chemically with anaerobic adhesive, meaning they need to be helped to allow the adhesive to cure in a timely manner. Also note that passive surfaces may require a longer curing time for the adhesive. An activator can be used to shorten the curing time of the anaerobic adhesive. Loctite 7649 brand activator would be a good solution here. Loctite activator should be applied to one of the surfaces before applying the anaerobic adhesive to activate that surface. Thanks to Loctite 7649, even at lower temperatures, the adhesive cures without problems.
I don't know which anaerobic product to choose, who can help me?
Anaerobic adhesives are extremely versatile and powerful industrial tools that permanently bond metals and some plastics. The Melkib company offers a wide range of special anaerobic adhesives, intended for securing threads, embedding bearings, connecting metal parts, which protect the covered element against the influence of external factors. The version of the anaerobic adhesive should always be optimally adapted to the type of material used, as well as the conditions in which the gluing process is carried out or the subsequent use of the glued element.
Specialized technical consultants at Melkib will suggest types of anaerobic adhesives suitable for a given production process, explain the method of their application and use, and the correct rules for storing anaerobic adhesives.
