Question about sulfides and AWWA C-105 ?
Question about sulfides and AWWA C-105 ?
(OP)
A local material supplier wanted information on corrosivity of his select and base course materials to provide to clients.
We had the following tests run to check for iron pipe corrosivity: pH, resistivity, sulfates, chlorides, sulfides, & REDOX.
I'm not sure how to interpret the Sulfides. AWWA C-105 Appendix A and ASTM A888 Appendix X1 discuss determining iron corrosion using a 10 point scale.
For this scale, sulfides are classified as Positive, Trace, or Negative using a sodium azide-iodine qualitative test. I have been provided a mg/L quantitative amount. Therefore, I don't know what standard to use for metal pipe corrosion, if not the AWWA C-105 standard or ASTM?
Any recommended standards for corrosivity to other materials, like concrete? Thanks for any info you can provide.
We had the following tests run to check for iron pipe corrosivity: pH, resistivity, sulfates, chlorides, sulfides, & REDOX.
I'm not sure how to interpret the Sulfides. AWWA C-105 Appendix A and ASTM A888 Appendix X1 discuss determining iron corrosion using a 10 point scale.
For this scale, sulfides are classified as Positive, Trace, or Negative using a sodium azide-iodine qualitative test. I have been provided a mg/L quantitative amount. Therefore, I don't know what standard to use for metal pipe corrosion, if not the AWWA C-105 standard or ASTM?
Any recommended standards for corrosivity to other materials, like concrete? Thanks for any info you can provide.





RE: Question about sulfides and AWWA C-105 ?
As for concrete, consult the table in ACI 201.2R for aggressive chemical attack on concrete.
RE: Question about sulfides and AWWA C-105 ?
It seems Caltrans and ACI use ppm for sulfates and chlorides. I have no idea how to translate the mg/L provided to me. Or the previously mentioned sulfides in mg/L.
RE: Question about sulfides and AWWA C-105 ?
http
External corrosion and corrosion control of buried water mains
by Andrew E Romer; Graham E C Bell; Steven J Duranceau; Scot Foreman; AWWA Research Foundation.
You can find the book in a library with worldcat
http
If you are asking to convert mg/l:
ppm = (mass of substance/mass of solvent) x 1,000,000 which means one part per million is 1g of substance in 1,000,000 grams of solvent as water has a density of 1g per ml we can say 1 ppm = 1 mg/L
http://www.engineeringtoolbox.com/ppm-d_1039.html