Cause of Well pump corrosion 1

[mdszj]

I have an application in which a well pump is being severely corroded. I am trying to find out how to determine whether the corrosion is caused by an electrical problem of some kind, and also find out what I can do to solve this problem, like use a sacrificial anode, etc. ANy info is appreciated.

 

[Jlevie]

Hmmm. Without an analysis of what is in the groundwater it is difficult to say exactly what may be causing the corrosion. The type of pump and location of the corrosion are also helpful (i.e. length of contact period, specific areas, different metals which may act as a galvanic cell with an electrlytic solution, etc.)

The corrosion may be caused by the water chemistry, dissimilar metals with an electrolyte in solution, or by microbial action (sulfur/iron reducing bacteria).

Do you have more information?

 

[mdszj]

Unfortunately that is pretty much all the info I have at this point. I am planning to check the water for chloride and other anions as well as metals and pH. I also have no info on bio in the wells but I know that in the area of eastern PA(Tranguch, PA) there are projeects that have problems w/ Fe/bio fouling. I saw a picture of the transducer (earlier info given to me indicated it was a pump) and it looked like there was severe corrosion at very localized areas on its surface rather than uniform corrosion over the entire surface. After reading up on this I am wondering if some kind of pitting corrosion is occurring due to bangs, physical defects, etc. on those particular areas of the transducer.

 

Have you heard of "catalytic surface conversion"? It is an electro-chemical process that decrease the surface porosity of steel and thereby resists corrosion. Check out this website:

http://www.j-tex-technology.com