Conversion of chloride content and sulphates into ppm 1

[IngGeo]

Dear All,

Currently I am working on a submarine pipeline project, and a third party provided chemical tests for soil and water. For chloride content , Cl, results are in percentage and for sulphates, SO3, in g/L.

1. How to transform those results into ppm? For percentage as far I understand 1ppm = 0.0001%, is this correct? For g/L, no idea.

2. Do you know any data or reference regarding corrosion or aggressiveness of chemicals of water and soil such as chloride, sulphate, pH, on steel?

Thank you in advance for your answers.

 

[Ron]

1 mg/L = 1 ppm, so 1 g/L = 1000 ppm

 

[IngGeo]

Thank you Ron for your valuable contribution.

Do you have any data on item 2?

Best Regards

 

[Ron]

Sulphates are slow reactors for the most part, but do attack steel in contact with them in soluble form. Sulphates will also attack concrete.

Chlorides do not attack concrete; however, they aggressively attack steel (rebar and embedments).

Low pH attacks steel; however, high pH such as in concrete, actually passivates and protects steel, as long as there is not a strong oxidizer (such as chloride) present.

There's plenty of info available on all these. Do a Google search on chloride attack on steel, sulphate attack on steel, sulphate attack on concrete, pH and steel corrosion, chloride corrosion of steel, etc. You'll get lots of info.