Corrosion and Electrochemical Behavior of Iron-Chromium-Nickel Alloys in Concentrated Sulfuric Acid Solutions

2009 ◽  
pp. 96-96-14 ◽  
Author(s):  
HS Tong
Keyword(s):  
Sulfuric Acid ◽  
Electrochemical Behavior ◽  
Nickel Alloys ◽  
Acid Solutions ◽  
Iron Chromium Nickel Alloys ◽  
Concentrated Sulfuric Acid ◽  
Sulfuric Acid Solutions ◽  
Iron Chromium

Tribocorrosion behavior of Ti3SiC2 in the dilute and concentrated sulfuric acid solutions

Wear ◽  
2010 ◽  
Vol 269 (1-2) ◽  
pp. 50-59 ◽  
Author(s):  
Shufang Ren ◽  
Junhu Meng ◽  
Jingbo Wang ◽  
Jinjun Lu ◽  
Shengrong Yang
Keyword(s):  
Sulfuric Acid ◽  
Acid Solutions ◽  
Concentrated Sulfuric Acid ◽  
Sulfuric Acid Solutions

The excess acidity method. The basicities, and rates and mechanisms of enolization, of some acetophenones and acetone, in moderately concentrated sulfuric acid

1979 ◽  
Vol 57 (22) ◽  
pp. 2952-2959 ◽  
Author(s):  
Robin A. Cox ◽  
Clinton R. Smith ◽  
Keith Yates
Keyword(s):  
Sulfuric Acid ◽  
Function Method ◽  
Water Molecules ◽  
Acid Solutions ◽  
Linear Free Energy ◽  
Rate Determining Step ◽  
Energy Relationships ◽  
Concentrated Sulfuric Acid ◽  
Sulfuric Acid Solutions ◽  
Medium Acidity

The X-function method has been used to evaluate the basicities of six nuclear-substituted acetophenones and acetone, using a combination of new measurements and literature data; the protonation [Formula: see text] of acetone was found to be −5.37. The same method, which involves the excess medium acidity, when used to analyze the enolization rate constants obtained from the measured bromination rates, shows that most of the acetophenones enolize by an A-2 process involving two water molecules in the rate-determining step. Observed linear free energy relationships for the basicities and the enolization rates imply a relatively early transition state for the enolization. Acetone was found to enolize by a similar mechanism in sulfuric acid solutions more dilute than 81% w/w, but at higher acidities bisulfate ion was the preferred base. The mechanistic behaviour of 4-nitroacetophenone was found to be different, not A-2 but either A-1 or A-SE2.

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