دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a specific quantity of material that is processed, treated. or used in one operation. 2. in corrosion control, a quantity of chemical corrosion inhibitors injected into the lines of a production system. 3. in oilwell cementing, a part of the total quantity of cement to be used in a well. 4. in pipelining, a quantity of one weight or type of crude or liquid product pumped next to one of different weight or type.

n: in corrosion control, the injection of a quantity of chemical corrosion inhibitors into the lines of a production

n: in corrosion control, the constant injection of small quantities of chemical corrosion inhibitors into the lines of a production system.

n: a commonly used nonpolarising electrode used in corrosion control to measure the electrical potential of a metal structure to a surrounding electrolyte to determine the potential for corrosion damage or to monitor the effectiveness of existing control measures. See half-cell.

n: the measures used to prevent or reduce the effects of corrosion. These practices can range from simply painting metal, to isolating it from moisture and chemicals and insulating it from galvanic currents, to cathodic protection, in which a galvanic or impressed direct electric current renders a pipeline cathodic, thus causing it to be a negative element in the circuit. The use of chemical inhibitors and closed systems are other examples of corrosion control.

a corrosion control mechanism in which a small charge is used to oppose the electrical current generated by a corrosion cell. The current reduces metal loss at the anode.

n: (NACE) organisation whose function is to establish standards and recommended practices for the field of corrosion control. Its publications are Corrosion, Corrosion Abstracts, and Materials Performance. Address: Box 218340;Houston, TX 77218-8340;(281) 492-0535;fax (281) 492-8254.

n: the durability or longevity of inhibitors used in corrosion control.

n: (S) a pale yellow, nonmetallic chemical element. In its elemental state- free sulfur-it has a crystalline or amorphous form. In many gas streams, sulfur may be found as volatile sulfur compounds- hydrogen sulfide, sulfur oxides, mercaptans, carbonyl sulfide. Reduction of their concentration levels is necessary for corrosion control and, in many cases, necessary for health and safety reasons.