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The wear and corrosion behaviors are characterized by potentiodynamic polarization , electrochemical impedance spectroscopy , wear rate , coefficient of friction , and worn surface morphology .
 concept or principle: wear; machanical property: corrosion behaviors; process characterization: potentiodynamic polarization; concept or principle: electrochemical; concept or principle: spectroscopy; concept or principle: wear; machanical property: coefficient of friction; process characterization: surface morphology
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: wear; machanical property: corrosion behaviors; process characterization: potentiodynamic polarization; concept or principle: electrochemical; concept or principle: spectroscopy; concept or principle: wear; machanical property: coefficient of friction; process characterization: surface morphology