Nace Rp 0775 Pdf Free
the corrosion resistance of the corrosion coupons has been tested by applying an electrochemical potential of 5 v (v) and a current of 2 amperes (a). it is considered that this potential causes an electrochemical potential on the coupon surface of 5 v. a galvanostatic test is performed with this potential and a corrosion rate measured using a digital weight method. the results are shown in the table below.
the results shown in the table above confirm a corrosion resistance of the corrosion coupon by application of the electrochemical potential of 5 v, verifying the obtained results in the phase i. the electrochemical potential of 5 v is chosen because it is a realistic potential during the drilling phase. the corrosion rate determined in the phase ii at the data measured in this work is comparable to other tests at this same potential. it is observed that the corrosion rate of the coupon depends on the exposure time, and remains constant after a specific time (5 days). the ph is stable during the test, even with the direct application of electrical potential.
this nace international (nace) standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. its acceptance does not in any respect preclude anyone, whether he has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not in conformance with this standard. nothing contained in this nace standard is to be construed as granting any right, by implication or otherwise, to manufacture, sell, or use in connection with any method, apparatus, or product covered by letters patent, or as indemnifying or protecting anyone against liability for infringement of letters patent. this standard represents minimum requirements and should in no way be interpreted as a restriction on the use of better procedures or materials. neither is this standard intended to apply in all cases relating to the subject. unpredictable circumstances may negate the usefulness of this standard in specific instances. nace assumes no responsibility for the interpretation or use of this standard by other parties and accepts responsibility for only those official nace interpretations issued by nace in accordance with its governing procedures and policies which preclude the issuance of interpretations by individual volunteers.
nace international is the global association for the development of technical standards for the oil and gas industry. nace international has published over 180 standards and guides since it was founded in the early 1970s. nace international is made up of approximately 20,000 individuals from all aspects of the oil and gas industry including well service contractors, suppliers, equipment manufacturers, and government agencies. nace international is a non-profit, non-regulatory, non-profit organization dedicated to providing quality engineering standards and the knowledge and information needed to use them. nace international is headquartered in houston, texas.
this nace international standard is intended to be a minimum set of requirements. since the standard is intended to be used by personnel who are not trained in technical matters, the standard does not provide detailed information about all of the materials and equipment that may be used for cathodic protection. additional information is provided by nace rp-077530 and may be obtained from nace international.
nace rp-0775 and nace rp-077514[14] is intended to be used in conjunction with nace rp-077530. the values of the impressed current density and impressed current obtained in this study were compared with the values of the impressed current density and impressed current calculated in nace rp-077530. there was good agreement between the two sets of data.
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