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2、n American National StandardStandard Test Methods forCorrosivity of Solvent Systems for Removing Water-FormedDeposits1This standard is issued under the fixed designation D 3263; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
3、ear of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover the determination of corrosiv- ity of solvent systems used to remove water-formed dep
4、osits from the metal and alloy surfaces of water handling equipment. Four test methods are given as follows:SectionsTest Method ACorrosivity in the Absence of Deposits10 to 15Test Method BCorrosivity in the Presence of Selected Ions16 to 21Test Method CCorrosivity with Magnetite-Coated SteelSpecimen
5、s22 to 28Test Method DCorrosivity with Deposit-Coated Specimens29 to 351.2 Test Methods A and B provide for corrosivity testing under either static immersion or dynamic conditions.1.3 Test Methods C and D are procedures applicable for corrosivity testing under static immersion conditions only.1.4 Th
6、is standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.2. Referenced Doc
7、uments2.1 ASTM Standards:D 1129 Terminology Relating to Water2D 1193 Specification for Reagent Water2D 2790 Test Methods of Analysis of Solvent Systems Used for Removal of Water-Formed Deposits33. Terminology3.1 Definitions:3.1.1 For definitions of terms used in these test methods, refer to Definiti
8、ons D 1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 solvent systemspecified chemicals or combinations of chemicals, which may include corrosion inhibitors designed to react with and remove deposits.1 These test methods are under the jurisdiction of ASTM Committee D19 on Water and are
9、 the direct responsibility of Subcommittee D19.03 on Sampling of Water and Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water.Current edition approved Aug. 10, 2003. Published September 2003. Originally approved in 1973. L
10、ast previous edition approved in 1999 as D 3263 82 (1999)e1.2 Annual Book of ASTM Standards, Vol 11.01.3 Discontinued. See 1992 Annual Book of ASTM Standards, Vol 11.02.4. Summary of Test Methods4.1 These test methods consist of procedures wherein the corrosivity of solvent systems is determined by
11、the weight loss experienced by metal specimens during exposure to the solvent systems.4.2 Test Method A is a procedure to determine corrosivity from the weight loss of metal specimens during exposure to solvent systems in the absence of deposits. This corrosivity can be determined by either static i
12、mmersion or dynamic tech- niques.4.3 Test Method B provides the determination in solvent systems that have had selected ions added. It describes tech- niques for manufacturing the solvent with the desired ions and refers to Test Method A for the acutal corrosivity testing.4.4 Test Method C describes
13、 the techniques used to produce magnetited specimens that are subsequently used for the determination of the corrosivity of the solvent system.4.5 Test Method D describes the techniques used to produce specimens coated with a synthetic deposit that are subsequently used for the determination of the
14、corrosivity of the solvent system.5. Significance and Use5.1 Test Method A is necessary because the corrosivity of a solvent system can be detrimental to the equipment being cleaned. It is used to compare the corrosivity of various solvent systems and to determine the corrosivity of selected solvent
15、 systems under different conditions.5.2 Test Method B is necessary because the corrosivity of a solvent system can be changed by the presence of ions in the solvent system. It is used to determine if the ions that might be present during a cleaning operation would significantly change the corrosivit
16、y of a solvent system.5.3 Test Method C is necessary because the corrosivity of a solvent system under magnetite removal conditions can be different from the corrosivity in the absence of deposit. It is used to determine the corrosivity of the solvent system under magnetite removal conditions.5.4 Te
17、st Method D is necessary because the presence or absence of deposits may affect the corrosivity of the solvent system. It is used to determine the corrosivity of solventCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.1D 3263 03systems
18、 on deposit-coated specimens. These results are com-pared with results obtained from Test Method A to determine the effect of the deposit.6. Specimen Composition and Size6.1 Test specimens for Test Methods A, B, and C may be flat coupons, either rectangular or circular in shape, or rod or tubular ma
19、terial. Regardless of form, finish all specimens to a size, including edges or ends, of 38.7 cm2 (6 in.2). Prepare coupon or rod specimens from hot- or cold-rolled stock, either ferrous or nonferrous, having a composition acceptable to all interested parties. Take tubular specimens from cold-drawn s
20、tock of appropriate composition; the inside diameter shall be no less than 12.7 mm (0.5 in.). Steel specimens only are used in Test Method C.6.2 Circular coupon specimens only are used in Test Method D. They shall conform to all conditions prescribed in 6.1 except that the size shall be such that on
21、e side provides the test area of 38.7 cm2 (6 in.2).7. Specimen Preparation7.1 Prepare four specimens of whatever form for each test condition.7.2 Coupon Specimens:7.2.1 Cut specimens by sawing, abrasive cut-off, or milling(shearing is not permissible). Any such power-cutting opera- tion must include
22、 adequate cooling to prevent metallurgical changes that might result from excessive heating. Perform final mechanical finishing of the specimens, with 120-grit silicon carbide cloth. Round all edges and corners lightly. Sand blasting for finishing is not permissible. For ferrous specimens the altern
23、ative use of microglass bead blasting is permissible.7.2.2 Drill a 3.2-mm (0.125-in.) hole near the top of rectangular specimens and through the center of circular test pieces for suspension in the solvent.7.2.3 Mark specimens for identification by an engraving tool. (Do not identify specimens by st
24、amping.)7.2.4 Final preparation of the specimens shall be as follows:7.2.4.1 Ferrous Specimens:(1) Degrease by immersion in n-hexane.(2) Pickle with uninhibited hydrochloric acid (HCl, 1 + 1)at room temperature for 10 min.(3) Neutralize by immersion in hot saturated sodium bicarbonate (NaHCO3) solut
25、ion.(4) Rinse with water.(5) Dry.7.2.4.2 Nonferrous and Stainless Steel Specimens:(1) Degrease by immersion in n-hexane.(2) Scrub with household cleanser containing no oxidizing agents.(3) Rinse with water.(4) Dry.7.2.4.3 Handle the specimens only with tongs or suitable7.3 Rod-Type Specimens:7.3.1 S
26、ize specimens to 12.7-mm (0.5-in.) diameter with the end rounded to a 6.35-mm (0.25-in.) radius. Perform all cutting and sizing operations by lathe turning, grinding, or milling, with adequate cooling to prevent metallurgical changes due to excessive heating. Perform final mechanical finishing of th
27、e specimen with 120-grit silicon carbide cloth.7.3.2 Drill a 3.2-mm (0.125-in.) hole into the axial center line of one end and attach a polypropylene rod section for suspension of the specimen in the solvent with epoxy cement.7.3.3 Mark the specimens for identification as in 7.2.3.7.4 Tubular Specim
28、ens:7.4.1 Perform all cutting operations by lathe turning, saw- ing, reaming, etc. with adequate cooling to prevent metallur- gical changes. Finish both the external and internal surfaces of the tubing. Do final mechanical finishing of the specimen with120-grit silicon carbide cloth.7.4.2 Drill a 3.
29、2-mm (0.125-in.) hole in each specimen near one end for suspension in the solvent.7.4.3 Mark the specimens for identification as in 7.2.3.7.4.4 Clean and weigh specimens as specified in 7.2.4.8. Reagents and Materials8.1 Purity of Reagents:8.1.1 All solvent materials such as acids, inhibitors, and o
30、ther additives shall be of commercial or technical grade, such as would normally be employed in chemical cleaning practices for the removal of water-formed deposits.8.1.2 Reagent grade chemicals shall be used for cleaning test specimens, for addition of selected ions to solvent systems(Test Method B
31、), preparing synthetic deposits (Test Method D), or analyzing a solvent for active components or water- formed deposit constitutents. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemi- cal So
32、ciety, where such specifications are available. 48.2 Purity of WaterUnless otherwise indicated, references to water shall be understood to mean reagent water, conform- ing to Specification D 1193, Type III.8.3 Reagents for Cleaning Specimens:8.3.1 N-Hexane .8.3.2 Hydrochloric Acid (1 + 1)Carefully a
33、dd 1 volume of hydrochloric acid (HCl, sp gr 1.19) to volume of water.8.3.3 Methyl Alcohol (CH3OH), absolute.8.3.4 Sodium Bicarbonate Solution (100 g/L)Dissolve100 g of sodium bicarbonate (NaHCO3) in water and dilute solution to 1 L.9. Hazards9.1 This standard may involve the use of hazardous mate-
34、rials, operations, and equipment. It is the responsibility of whoever uses this standard to establish appropriate safetyplastic gloves during this cleaning and drying period as well as all other operations until after the final weighing followingexposure to the test solvent.7.2.4.4 Weigh each specim
35、en to 61.0 mg after cooling and store in a desiccator until ready for use. Recheck after storage for constant weight.4 Reagent Chemicals, American Chemical Society Specifications, AmericanChemical Society, Washington, DC. For suggestions on the testing of reagents not listed by the American Chemical
36、 Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville, MD.2D 3263 03practices and to determine the applicability of regulatorylimitations prior to use.T
37、EST METHOD ACORROSIVITY IN THE ABSENCE OF DEPOSITS10. Scope10.1 This test method covers the determination of corrosiv- ity of solvent systems used to remove water-formed deposits from metal and alloy surfaces. It provides for corrosivity testing in the absence of deposit.10.2 It provides for corrosi
38、vity testing under static immer- sion and dynamic conditions.11. Summary of Test Method11.1 This test method provides procedures for determining the corrosivity of diverse solvent systems used for the removal of water-formed deposits under three sets of conditions as follows:11.1.1 Testing by static
39、 immersion of specimens in the solvent,11.1.2 Testing under velocity conditions resulting from the flow of fluid past the specimens, and11.1.3 Testing under velocity conditions resulting from the rotation of the specimens in the solvent.11.2 The weight loss of the specimens is determined after a6-h
40、contact period. Other parameters such as possible solvent composition and concentration, temperature, and addition of inhibitors cover a range that cannot be standardized. Each test must be defined in terms of these variables as mutually agreed upon by all interested parties. The following temperatu
41、re ranges are suggested when acidic solvents are used:11.2.1 Nonferrous Alloys37.8 to 65.6C (100 to 150F).11.2.2 Ferrous Alloys 65.6 to 93.3C (150 to 200F).11.3 Specimens for static immersion or flowing stream testing are rectangular or circular, flat coupons, rods, or tubular shapes as described in
42、 Section 6. For rotating specimen testing only the rod form is used. In all cases specimens are prepared as prescribed in Section 7.12. Apparatus12.1 For Static Immersion Testing:12.1.1 Constant-Temperature Bath, thermostatically con- trolled to 61.1C (2F) and provided with suitable openings and sup
43、ports for the test containers.12.1.2 Test Containers 500-mL, tall form, liplesspolypropylene beakers. They shall be fitted with tight covers.12.2 For Testing Under Fluid Flow Velocity Conditions:12.2.1 Test Loop for Circulating Solvent (Fig. 1), contain- ing provisions for solvent temperature contro
44、l 61.1C (2F), flow control, and by-pass flow during temperature adjustment.12.2.2 Flow Chamber Assembly (Fig. 2 and Fig. 3), with mounts for coupon, rod, and tubular specimens.12.3 For Testing Under Rotating Specimen Velocity Condi- tions:12.3.1 Constant-Temperature BathSee 12.1.1.12.3.2 Apparatus f
45、or Rotation of Rod-Type Specimens (Fig.4).13. Procedure13.1 Prepare the test solvents using a weight-percent basis for the acid or other active material, including any additives. Only inhibitors supplied in liquid form shall be added on a volume basis prescribed by the manufacturer. The quantity of
46、solvent prepared for static immersion and rotating specimen conditions shall be sufficient to fill essentially all test contain- ers using four for each type of specimen-solvent combination. For fluid flow testing prepare a quantity of solvent equal to150 % of the volume of the circulating system plus 150 mL for each specimen exposed.13.2 Static Immersion Test:13.2.1 Pour 450 mL of solvent into each test beaker (12.1.2) and place in the constant-temperature bath (12.1.1) that has been preheate