Custom Metal parts CNC MachningGeomet Dacromet Oxided Cadmium Lathe Machining Parts

Custom Metal parts CNC MachningGeomet Dacromet Oxided Cadmium Lathe Machining Parts

Product Description:

Hex Bolts: Applications and Advantages

Hex bolts are widely used across various industries and products due to their simple design, high strength, and ease of installation. Below are some key applications and advantages of hex bolts:

Industries and Products That Use Hex Bolts

1. Construction Industry
- Hex bolts are commonly used in structural steel connections, such as bridges, building frameworks, and scaffolding. Their ability to handle heavy loads and external forces like wind ensures stability and durability in construction projects.

2. Machinery Manufacturing
- In machinery and equipment assembly, hex bolts are essential for fastening mechanical parts in machinery such as lathes, heavy-duty equipment, and assembly lines. Their high strength and durability make them suitable for machines operating under vibration and heavy loads.

3. Automotive and Transportation
- Hex bolts are widely used in the automotive industry for securing critical parts like chassis, engines, and transmission systems. Their strength and reliability help maintain the vehicle's integrity under high-speed and heavy-duty conditions.

4. Home Appliances and Electronics
- Hex bolts are used to assemble and secure parts in appliances such as air conditioners, washing machines, and televisions. They provide reliable connections and ensure the overall stability of the products.

5. Energy and Petrochemical Industry
- Hex bolts are crucial in wind turbines, nuclear power plants, and petrochemical plants, where they are used in securing large equipment and pipeline systems. Their corrosion resistance and strength allow them to perform in harsh environments.

6. Marine and Offshore Engineering
- In shipbuilding and offshore platforms, hex bolts are used to secure deck fittings, hulls, and equipment. Stainless steel hex bolts, in particular, resist corrosion from seawater, ensuring the longevity of marine structures.

7. Furniture Manufacturing
-Hex bolts are frequently used in the assembly of furniture such as beds, tables, chairs, and cabinets. Their easy installation and firm fastening provide stability and long-term durability to household and office furniture.

Applications

Cadmium plating is widely used to protect steel and cast iron from corrosion. Cadmium plating is used to protect the inner metal, and since cadmium is an anode with respect to iron, the ferrous metal underneath it and even the bare substrate when the cadmium is strained or etched out of the cracks are protected by the consumption of cadmium plates. Usually cadmium is applied as a thin layer (less than 25μm or 1mil thick) to resist atmospheric corrosion. Cadmium in the marine atmosphere or seawater contact parts and in the hot water above 70 ℃, cadmium plating is more stable, corrosion resistance, so cadmium plating is often used in the marine environment using the plating.
Cadmium is a silver-white malleable metal. Cadmium metal is easy to forge and rolling. Cadmium's relative atomic mass is 112.41, density is 8.65g/cm3, melting point is 320.9 ℃, boiling point is 767 ℃. Cadmium exists as a divalent metal in compounds. Its hardness is 200 HV.Cadmium's chemical properties are very similar to zinc, but it is insoluble in alkali, soluble in nitric acid and ammonium nitrate, and dissolves very slowly in dilute sulfuric acid and dilute hydrochloric acid. At room temperature and dry air, almost no chemical change, but in the humid air cadmium is easy to oxidise, the formation of oxide film can protect the metal cadmium no longer continue to be corroded.
Cadmium vapour and soluble cadmium salts are toxic and must be strictly prevented from cadmium pollution. The standard potential of cadmium is -0.4 V. In the general industrial atmosphere, cadmium plating on steel parts is cathodic plating, but in the maritime climate, seawater or high temperature environment, cadmium plating on steel parts is anodic plating. When the working temperature exceeds 232 ℃ above, cadmium plating is easy to cause parts brittle.
Cadmium plating is commonly used in aviation, navigation, radio and electronic parts of the protection.
Domestic production of cadmium plating solution used in more types: ammonia carboxyl complex cadmium plating, acid sulfate cadmium plating and cyanide cadmium plating. In addition, there are pyrophosphate cadmium plating, alkaline triethanolamine cadmium plating and HEDP cadmium plating.

Cadmium plating is also prone to ‘cadmium brittle’ phenomenon, usually at higher temperatures, and at the same time the existence of certain stress conditions, can make steel and titanium alloys produce cadmium brittle. As cadmium plating layer in 232 ℃ above can be leached into the steel parts of the matrix, can cause the so-called ‘cadmium brittle’ phenomenon, so the use of temperature should not exceed 232 ℃.
Cadmium-plated layer can be welded, the plating can reduce the oxidation of copper-plated electrical contacts, but also does not increase the contact resistance. Cadmium-plated layer is usually used in steel fasteners, piping and other stressed parts, aluminium and aluminium alloy parts, magnesium alloy parts, and rubber contact with the steel and copper parts. Especially some elastic parts, threaded parts, standard parts and aerospace, shipbuilding, electronics and military products are used to use cadmium plating. But cadmium vapour and its soluble salts are highly toxic and seriously pollute the environment. Therefore, the application of cadmium plating layer is subject to strict limitations, has been rarely used, most of the zinc plating layer and zinc alloy layer to replace the cadmium plating layer.

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