prbset09_key4324 - EMA 4324 Problem Set 9 KEY 4-9. Given...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
EMA 4324 Problem Set 9 KEY 4-9. Given active-passive alloys A and B having the following electro-chemical parameters: [a] Which will be the more corrosion resistant under reducing conditions [active state]? Why? ***************************************************** Alloy B has the lower corrosion current, therefore higher corrosion resistance. 1.2 1x10 -6 0.3 0.1 7x10 -7 -0.200 B 0.7 1x10 -5 0 0.1 1x10 -6 -0.400 A E tr , V I pass , A E pp , V b A , V I corr , A E corr , V alloy -1.0 -0.5 0.0 0.5 1.0 1.5 potential, volts SCE -10 -8 -6 -4 -2 0 log current density, log[A/cm^2] alloy A alloy B
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
[b] Which will be the more corrosion resistant in the passive state? Why? ********************************************************** Alloy B - It has the smaller value for I pass . [c] Which is more easily passivated by dissolved oxidizers? Why? ********************************************************** Alloy A - It has the lower value of I crit [d] Which is more corrosion resistant in strongly oxidizing solutions? Why?
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

prbset09_key4324 - EMA 4324 Problem Set 9 KEY 4-9. Given...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online