Corrosion Failure Analysis

Applicable materials: Suitable for various metal and alloy components such as carbon steel, alloy steel, stainless steel, duplex steel, nickel based alloys, aluminum alloys, copper alloys, titanium alloys, etc.

Applicable objects: covering pressure vessels, pipelines, valves, flanges, heat exchange equipment, marine structures of ships, chemical equipment, boilers, fasteners, welded structures, and various components that fail to function in corrosive environments.

Applicable environment: including corrosive environments such as atmosphere, seawater, soil, acid-base salt media, high temperature and high pressure, chloride ions, hydrogen sulfide, circulating cooling water, etc.

Macro analysis: appearance inspection, corrosion morphology recording, failure location, preliminary judgment of failure mode.

Microscopic analysis: metallographic structure analysis, observation of corrosion product morphology, intergranular corrosion, pitting corrosion, crevice corrosion, stress corrosion, hydrogen induced cracking and other microscopic characteristic analysis.

Composition analysis: Analysis of matrix material composition, corrosion product composition, surface sediment, and medium composition.

Mechanical performance verification: Review of hardness, tensile, impact and other properties to determine the material and heat treatment status.

Corrosion type determination: including uniform corrosion, pitting corrosion, crevice corrosion, intergranular corrosion, galvanic corrosion, stress corrosion cracking, corrosion fatigue, hydrogen embrittlement, sulfide stress cracking, etc.

Corrosion rate and remaining life assessment.

Comprehensive analysis of failure causes: comprehensive judgment of multiple factors such as materials, environment, stress, process, assembly, use and maintenance.

Suggestions for failure prevention and improvement measures.