Course Hero Logo

After drying current ma 0351 02765 03900 d after 10

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 4 - 7 out of 8 pages.

After dryingCurrent (mA)0.3510.27650.3900d)After 10 minutes, the ordinary nail was observed having corrosive activity while the stressrelieved nail seemed passive.e)Potential between stainless steel plate and ordinary steel plate: 612.0 mVTable 4: Potential between different steel platesPotential upon contact (mV)Potential upon separation(mV)Trial 10.1502.921102.7630.042.184
Potential between two stainless steel plates: 14.09 mVf)Table 5: Current in different anode materialsAnode MaterialCurrent (mA)Steel plate9.04Ordinary steel nail10.292Thin copper wire3.03Based on the data collected, it was determined that despite the changes in the size of theanode, the current experienced relatively small change. This leads to the conclusion that it is theCathode size that truly has an effect on the current. Since a bigger cathode has more space toaccept additional electrons from the anode,this increases the likelihood of corisson.g)Ordinary nail weight: 3.00 +/- 0.05 gTable 6: Rate of CorrosionTime (min.)Current (mA)Time (min.)Current (mA)11.437061.141021.353671.104031.275681.099341.222091.105451.1795101.1025Average Current = 1.202 mAGiven AW = 56 g/mol5
number of electrons transferred = 2based on the current observed, it will take approximately 100 days for the nail to completelydissolve.Discussion:Q1:In 1915 an ocean yacht was built, the hull being made of monel, riveted to a steel frame withiron rivets. The yacht did not last long because all rivets sprang. She fell literally apart. Explainwhy. (Monel is a corrosion resistant nickel-copper alloy)

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 8 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Winter
Professor
R.Ravinder
Tags

Newly uploaded documents

Show More

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture