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Dacromet Double-Ended Bolts

Dacromet double-ended bolts are corrosion-resistant fastening solutions that apply Dacromet coating technology to double-ended bolts. These Dacromet double-ended bolts are widely used in high-temperature and high-corrosion environments such as turbocharger connections, high-pressure common rail fuel systems, exhaust manifold mounting, and chemical valve flanges. Ordinary surface-treated double-ended bolts are prone to rusting and seizing under high temperatures and corrosive media, leading to difficult disassembly. Dacromet double-ended bolts, with their high-temperature resistance, corrosion resistance, and anti-seizing properties, can maintain smooth assembly and disassembly of the threaded joints for a long time. Furthermore, the threads at both ends and the smooth shank of Dacromet double-ended bolts receive a uniform coating, eliminating the insufficient coverage at the thread root common in electroplating, making them particularly suitable for equipment requiring regular maintenance.

Product Description

Dacromet double-ended bolts are corrosion-resistant fastening solutions that apply Dacromet coating technology to double-ended bolts. These Dacromet double-ended bolts are widely used in high-temperature and high-corrosion environments such as turbocharger connections, high-pressure common rail fuel systems, exhaust manifold mounting, and chemical valve flanges. Ordinary surface-treated double-ended bolts are prone to rusting and seizing under high temperatures and corrosive media, leading to difficult disassembly. Dacromet double-ended bolts , with their high-temperature resistance, corrosion resistance, and anti-seizing properties, can maintain smooth assembly and disassembly of the threaded joints for a long time. Furthermore, the threads at both ends and the smooth shank of Dacromet double-ended bolts receive a uniform coating, eliminating the insufficient coverage at the thread root common in electroplating, making them particularly suitable for equipment requiring regular maintenance.

Product Feature

High-Temperature Resistance and Anti-Seizing: The Dacromet coating effectively prevents cold welding or high-temperature seizing between threads below 300℃. The effect is even better when combined with copper-based or nickel-based anti-seizing agents, making them suitable for turbochargers and exhaust systems.

Uniform corrosion protection at both ends: The dip-coating process ensures a consistent coating on the screw-in end, the fastening end, and the intermediate smooth shank, avoiding the problems of over-plating at the thread crest and exposed iron at the thread root caused by the tip effect during electroplating.

No risk of hydrogen embrittlement: If double-ended bolts are electroplated with zinc and hydrogen is not sufficiently removed, delayed fracture may occur under long-term preload. The Dacromet process completely eliminates this risk.

Excellent resistance to media corrosion: Resistant to acidic salt spray, sulfur dioxide, organic solvents, and weak acids and alkalis, suitable for harsh environments such as valves in chemical plants and pipeline flanges on offshore platforms.