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Development Of Unified & Methodology Examining The Critical Pittng/Repassivation Potential And Temperature

Product Number: 51321-16855-SG
Author: Richard C Woollam; Daniel Betancourt; Jie Wen
Publication Date: 2021
$0.00
$20.00
$20.00

Standards ASTM G61 - used for Cyclic Potentiodynamic Polarization measurements, and G150 - used
in Critical Pitting Temperature measurements, are commonly used to determine the susceptibility of
corrosion resistant alloys to localized corrosion. The two methodologies utilize different, yet related,
driving forces applicable to the process, namely the potential and temperature. This study sought to
establish the relationship between the pitting potential from ASTM G61 and critical pitting temperature
from ASTM G150, both of which are determined as the driving force, potential or temperature, is on the
increase. ASTM G61 also establishes the repassivation potential as the potential is decreased. In this
study, ASTM G150 is extended to define the repassivation temperature for a decreasing temperature. The "unified" sapproach was utilized to identify the transition of a material from passive to active and its
return to passive. Laboratory experiments were performed with UNS S32205 in a solution of sodium
chloride.

Standards ASTM G61 - used for Cyclic Potentiodynamic Polarization measurements, and G150 - used
in Critical Pitting Temperature measurements, are commonly used to determine the susceptibility of
corrosion resistant alloys to localized corrosion. The two methodologies utilize different, yet related,
driving forces applicable to the process, namely the potential and temperature. This study sought to
establish the relationship between the pitting potential from ASTM G61 and critical pitting temperature
from ASTM G150, both of which are determined as the driving force, potential or temperature, is on the
increase. ASTM G61 also establishes the repassivation potential as the potential is decreased. In this
study, ASTM G150 is extended to define the repassivation temperature for a decreasing temperature. The "unified" sapproach was utilized to identify the transition of a material from passive to active and its
return to passive. Laboratory experiments were performed with UNS S32205 in a solution of sodium
chloride.

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