Which of the following expression is used for electrochemical techniques to determine the corrosion penetration rate?(a) Corrosion penetration rate = K (ai/D)(b) Corrosion penetration rate = K (ai/nD)(c) Corrosion penetration rate = (ai/nD)(d) Corrosion penetration rate = (ai/nD)This question was posed to me by my college professor while I was bunking the class.My enquiry is from Testing topic in section Corrosion Testing of Corrosion Engineering

Which of the following expression is used for electrochemical techniqu

1.	Which of the following expression is used for electrochemical techniques to determine the corrosion penetration rate?(a) Corrosion penetration rate = K (ai/D)(b) Corrosion penetration rate = K (ai/nD)(c) Corrosion penetration rate = (ai/nD)(d) Corrosion penetration rate = (ai/nD)This question was posed to me by my college professor while I was bunking the class.My enquiry is from Testing topic in section Corrosion Testing of Corrosion Engineering
Answer» Right ANSWER is (b) Corrosion penetration RATE = K (ai/nD) The explanation: The corrosion rate EXPRESSION that is used for electrochemical techniques to determine corrosion penetration rate is K (ai/nD) where a is the atomic weight of the metal, i is current density (in microamperes per sq. centimeters), n is the number of electrons lost, D is the density of metal, K is CONSTANT depends on the penetration rate desired.

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