Corrosion inhibitor intensifier and method of using the same
a corrosion inhibitor and intensifier technology, applied in the field of aqueous acid composition, can solve the problems of high cost of corrosion inhibitors, affecting the effect of corrosion inhibitors, and affecting the effect of corrosion inhibitors, and achieve the effect of reducing the corrosive effect of acidic solutions
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[0029] The following examples will illustrate the practice of the present invention in its preferred embodiments. Other embodiments within the scope of the claims herein will be apparent to one skilled in the art from consideration of the specification and practice of the invention as disclosed herein. It is intended that the specification, together with the example, be considered exemplary only, with the scope and spirit of the invention being indicated by the claims which follow.
[0030] In the Examples, the following abbreviations are employed:
[0031] CI-11 is a corrosion inhibitor containing alkylpyridinium quaternary, thiourea and oxyalkylated alkylphenols in isopropanol and water, commercially available from BJ Services Company.
[0032] CI-25 is a corrosion inhibitor containing a blend of quaternary salts, alcohols, formamide and ethoxylated nonylphenol, commercially available from BJ Services Company.
[0033] CI-14 and CI-30 are corrosion inhibitors, commercially available from ...
examples 1-92
[0038] Corrosion inhibitor formulations were prepared containing a corrosion inhibitor, a terpene and an acid solution, as set forth in Table I. Metal coupons where then soaked in these acids formulations at various temperatures. Corrosion was measured for a number of hours as indicated in the tables. Based on the weight loss of metal coupon, the corrosion rate was calculated by the following formula:
Corrosion Rate=[Initial Metal Mass (gram)]−[Final metal mass (gram)] / [Metal area (square centimeter)]
[0039] The results are compiled in Table I.
TABLE ITestExampleCorrosionInhibitorInhibitor,Intensifier,Acid Type,Times,MetalCorrosionNo.InhibitorIntensifierGPTGPTAmountTemp., ° F.HoursTypeRateComp. Ex.CI-11None4015% HCl18016N-800.0193 1 2CI-11Alpha Terpene2215% HCl20016N-800.0335Comp. ExCI-14None4015% HCl18016N-800.0195 3 4CI-14Alpha Terpene2215% HCl18016N-800.0115Comp. Ex.CI-14Antimony Salt2215% HCl18016N-800.1572 5 6CI-14Alpha Terpene2215% HCl20016N-800.0449 7CI-14D'Limonene2215% HCl2...
examples 93-96
[0040] Corrosion inhibitor formulations were prepared containing Antecor OG as corrosion inhibitor, a terpene and an acid solution of 2% HF, 13% acetic acid and 9% formic acid. A QT-900 coil tubing metal coupon was soaked in the acid solutions at 329° F. (165° C.) at 3500 psi under agitation for 8 hours. The results are compiled in Table II.
TABLE IICorrosionExampleInhibitor,Rate,PittingNo.GPTIntensifier @GPTlbs / ft2Number9320Alpha Terpene @ 250.0109Tr.9415Alpha Terpene @ 250.013519510Alpha Terpene @ 250.0162Tr.9620None0.0613Tr.
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