Chemical environment phosphonic acid

Potentiodynamic polarization in service. In the following examples, the polarization scans were generated after 1 and 4 days of exposure to a chemical product maintained at 49° C. The potential scan rate was 0.5 mV s, and the scan direction was reversed at 0.1 mA-cm 2. Coupon immersion tests were run in the same environment for 840 h. The goal of these tests was to examine whether S31600 steel could be used for short-term storage of a 50% commercial solution of aminotrimethylene phosphonic acid in water. A small amount of chlo-... 

Like other dissolved organic nutrients, the chemical composition of organic P is relatively unknown. Marine dissolved organic phosphorus (DOP) composition has been mostly identified as particular compound classes such as monophosphate esters, phosphonucleotides, nucleic acids, phospholipids, phosphonates and polyphosphates (Benitez-Nelson, 2000). Kolowith et al. (2001) found that monophosphate esters and phosphonates are major components in the Pacific Ocean, the Atlantic Ocean and the North Sea. ATP (adenosine triphosphate), ubiquitous in aU living cells, has been used as a model DOP compound in radiotracer experiments to obtain information on P sources and fluxes in natural environments (Bjorkman et al., 2000 Karl and Bossard, 1985) and cyanobacterial cultures (Fu et al., 2006). 

Chemical Stability Since all inhibitors contain functional groups (carboxylic acids, amines, Schiffs bases, phosphates, phosphonates, sulfur derivatives, and many more), they are pH sensitive, and therefore, their activity varies over actually fairly narrow pH ranges. For example, it has been shown that certain amines in sour systems lose activity if the pH of the environment shifts from 4 to 7 [S], while in CO2 systems the reverse has been observed [9]. 

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