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How do you remove corrosion from a water valve? 

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The products of corrosion enter the water, diminishing its quality, and may become a health hazard.
These results indicate that water adsorption is crucial for initializing atmospheric corrosion.
The results indicate that flow control valve body failed due to combination of hydrogen induced corrosion cracking (HICC) and sulfide stress corrosion cracking (SSCC).
A novel corrosion indicator, “corrosion inhibitory effect of cations Y”, that consists of X and molar volume ratio, ΔV, is proposed, and it is shown that the novel indicator can estimate the corrosion rate of mild steel in fresh water.
It is found that a higher flow rate induces a higher corrosion rate in various water containing conditions, which becomes much obvious with increasing the water concentration.
The results show that this environmental friendly corrosion inhibitor at relatively low dosages had a good inhibition effect on the carbon steel corrosion in soft water.
Journal ArticleDOI
Gonzalo Pizarro, Ignacio T. Vargas 
01 Aug 2016-Water supply
11 Citations
The results of this work highlight the necessity to incorporate the hydrodynamic effects in the analysis of corrosion and corrosion by-products release into drinking water piping systems.
Considering the corrosion of the whole steam–water system, a more effective feedwater chemistry treatment method is proposed.
Concurrently, the thermodynamic calculation suggests that impurities change the corrosion process through promoting the water precipitation and changing the water chemistry characteristics.

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