Passivation layer analysis
Passivation layer analysis examines the chemical composition and thickness of oxide layers using electrochemical or spectroscopic methods. It ensures corrosion resistance.
Physical-Chemical Mechanism of Action
Passivation layer analysis examines the chemical composition and thickness of oxide layers on metal surfaces. These layers can be determined by electrochemical or spectroscopic methods. They protect the metal from corrosion by forming a barrier.
Metallurgical Relevance & Welding Risks
Insufficient passivation can lead to increased corrosion susceptibility. This can cause cracks and loss of strength in the metal, reducing the service life of components. Correct analysis is therefore critical for the safety and durability of weld joints.
Shop Practice & Instructions
Use spectroscopic methods like Raman spectroscopy or electrochemical techniques like EIS (Electrochemical Impedance Spectroscopy) for analysis. Measure the layer thickness and chemical composition of the oxide layers. Make sure the layer is at least 10 nm thick and consists of proper materials (e.g., silicon dioxide for steel). These values guarantee effective passivation and corrosion resistance.