2. In an industrial atmosphere with high humid- 2. Referring to the galvanic series of some com-ity and SO, contentmercial metals and alloys in seawater, markthe condition which would lead to minimumcorrosion by galvanic coupling.a) the corrosion product [Fe(OH)2] beingformed is protectivethe corrosion product is formed awayofrom the corroding sitec) the corrosion product is formed at thecorroding sitea) Coupling of 18-8 steel active withchromium stainless steel, 13% Cr (active)b) 70-30 brass with pure copperA Silver and copperd) Magnesium and aluminum plates3. The following protective measures can be veryeffective in preventing uniform corrosion:3. Which of the following shows an unfavorablearea ratio?a) Select a thinner materialb) Prevent the material from atmosphere bycoveringUse an epoxy coatingd) Give a corrosion allowancea) Copper rivets in copper plateSteel rivets in copper platec) Aluminum rivets in aluminum plated) Brass rivets in copper plate4. If a metal undergoes uniform corrosion it 4. Which of the following would be most effec-becomestive in preventing galvanic corrosion?thinnerAvoiding unfavorable area ratiob) Adding inhibitorsc) Using welded joints of the same alloy asthe alloy to be weldedd) Increasing temperature at the point ofb) thickerc) perforated5. The following is the example of uniformcorrosion:contact of the two metalsa) Cracking of a pipe in the soilb) Perforation of a water pipeRusting of a steel tank in aird) Leakage of water pipe by corrosion5. Which of the following pairs of metalswould show the highest rate of corrosion inseawater?

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2. In an industrial atmosphere with high humid- 2. Referring to the galvanic series of some com- ity and SO, content mercial metals and alloys in seawater, mark the condition which would lead to minimum a) the corrosion product (Fe(OH)2] being formed is protective the corrosion product is formed away ofrom the corroding site ) the corrosion product is formed at the corroding site corrosion by galvanic coupling. a) Coupling of 18-8 steel active with chromium stainless steel, 13% Cr (active) b) 70-30 brass with pure copper Silver and copper d) Magnesium and aluminum plates

2. In an industrial atmosphere with high humid- 2. Referring to the galvanic series of some com- ity and SO, content mercial metals and alloys in seawater, mark the condition which would lead to minimum a) the corrosion product (Fe(OH)2] being formed is protective the corrosion product is formed away ofrom the corroding site ) the corrosion product is formed at the corroding site corrosion by galvanic coupling. a) Coupling of 18-8 steel active with chromium stainless steel, 13% Cr (active) b) 70-30 brass with pure copper Silver and copper d) Magnesium and aluminum plates

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Please attend both the questions asap thank you so much.
If the Standard Potential cell for the following AgI /Ag and I/I Was -0.152vand o, suv respectively. write the total chemical reaction for the Cell ? 2) what is the Potential cell if the meterial is Standard? 13) If the Potential cell increase with increasing Temperture of 1*104 V/K° Percent Calculate AG, AS, AH at 25c