What are the corrosion resistant alloy materials
Release time:
2025-03-25
Corrosion resistant alloy mainly includes iron base, nickel base, titanium alloy, copper base, cobalt base and zirconium alloy six categories according to the specific application scenario to choose different material combinations.
Corrosion resistant alloy mainly includes iron base, nickel base, titanium alloy, copper base, cobalt base and zirconium alloy six categories according to the specific application scenario to choose different material combinations. The following are the specific categories and typical applications:
Iron base corrosion resistant alloy (stainless steel)
austenitic stainless steel (e.g., 316L) : containing 18%Cr-8%Ni, suitable for nitric acid and organic acid environment below 80℃, widely used in chemical equipment, food processing
duplex stainless steel : combined with the advantages of austenite and ferrite, the chloride ion corrosion resistance is 3 times that of ordinary stainless steel, used in harsh environments such as offshore platforms
Nickel-based corrosion resistant alloy
Hastelloy (such as C-276, B-3) : in boiling hydrochloric acid corrosion rate <0.1mm/ year, used in strong acid reactor, flue gas desulfurization system
Monel (e.g. Monel 400) : hydrofluoric acid and seawater corrosion resistance, offshore platform pipeline core material
Inconel series : Maintain oxidation resistance at 980℃, special material for aeroengine combustion chamber
Titanium and titanium alloys
industrial pure titanium : seawater corrosion rate <0.0025mm, ship propeller standard material
Ti-6Al-4V : Excellent biocompatibility, accounting for 62% of orthopedic implant device market
Ti-Pd alloy : The corrosion rate in boiling sulfuric acid is 90% lower than that of pure titanium
Copper base alloy
white copper (such as B30) : corrosion-resistant life of more than 15 years in the Marine atmosphere, cross-sea bridge cable protection material
aluminum bronze : the abrasion resistance of phosphate medium is 10 times higher than that of cast iron
Special alloy
cobalt-based alloy (such as Stellite 6B) : stable in sulfur flue gas at 650℃, special for waste incinerator nozzles
zirconium alloy (such as Zr-2) : nuclear reactor cladding material, to achieve 100,000 hours without corrosion record
The three major principles of material selection : medium matching (stainless steel is preferred for nitric acid), cost-benefit ratio (duplex steel replaces titanium alloy), and full cycle evaluation (including maintenance costs). Recent developments include environmentally friendly alloys, self-healing coating technology and intelligent monitoring integration.
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Cheng Yuan
Alloy Material
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