While duplex stainless steel is highly resistant to general corrosion, it may be susceptible to certain types of corrosion under specific conditions, such as:

1. Chloride-Induced Corrosion: Duplex stainless steel can be sensitive to corrosion in environments with high chloride concentrations, such as those found in marine environments or chloride-containing solutions.

2. Pitting Corrosion: Pitting corrosion is a localized form of corrosion that can occur in the presence of aggressive ions, such as chloride ions. Duplex stainless steel is generally more resistant to pitting corrosion than austenitic stainless steel but may still be susceptible under extreme conditions.

3. Stress Corrosion Cracking (SCC): In certain environments with high chloride levels and tensile stresses, duplex stainless steel can be susceptible to stress corrosion cracking.

Duplex stainless steel is known for its excellent corrosion resistance, and it is generally more corrosion-resistant than standard austenitic stainless steel. However, under certain conditions, duplex stainless steel can still rust or experience localized corrosion.

Duplex stainless steel typically consists of a dual-phase microstructure, combining both austenitic (e.g., high chromium and nickel content) and ferritic (e.g., high chromium and molybdenum content) phases. This unique microstructure contributes to its high strength and corrosion resistance.

While duplex stainless steel is highly resistant to general corrosion, it may be susceptible to certain types of corrosion under specific conditions, such as Chloride-Induced Corrosion, Pitting Corrosion, and Stress Corrosion Cracking (SCC).

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