Total immersion corrosion test for

D 1280 1989 Method for total immersion corrosion test for soak tank metal cleaners... 

Method for total immersion corrosion test for tank-type aircraft maintenance chemicals Method for total immersion corrosion test for aircraft maintenance chemicals Practice for assessment of compatibility of bio-materials (non-porous) for surgical implants with respect to effect of materials in muscle and bone... 

Part 1, p 874, Test A262-44T ("Tentative Recommended Practice for Boiling Nitric Acid Test for Corrosion-Resisting Steels ) Part 1, p 878, Test A279-44T (Total Immersion Corrosion Test for Stainless Steels) 18) Kirk Othmer 4 (1949)... 

Standard Test Method for Total Immersion Corrosion Test for Soak Tank Metal Cleaners Standard Test Method for Corrosion Test for Engine Coolants in Glassware Standard Test Methods for Rubber O-Rings... 

D 930 Method for Total Immersion Corrosion Test of Wate Soluble Aluminum Cleaneis... 

The ASTM Corrosion Test procedure by Total Immersion Method requires that all specimens in a test series should have the same dimensions when comparisons are to be made. In these experiments, carbon steel was used representing the pipeline material. The coupons were cleaned, polished and weighed. Coal-water slurry, 10 to 40 weight percent, was used in the corrosion tests. For the coal-water slurry the intitial pH of the medium varied from 2.3 to 2.6 and the test series containing the nutrient media, the microorganisms and the inhibitors the pH varied from 2 to 2.5. Specimens were immersed in the reaction vessel maintained at a constant temperature of 86°F for 72 hours or the specified time. The coupons were removed, washed with deionized water, dried and weighed. The loss in weight of the specimen, before and after the test was attributed to corrosion. 

Laboratory Corrosion Test. The laboratory test procedure for the determination of corrosion rates of coal slurry used in this study was adapted from the method developed by Bomberger (26). The corrosion rates were determined by using ASTM Standard Corrosion Test, also known as the Total Immersion Method (27). The Bomberger technique consists of keeping coal slurry in suspension in a two-liter reaction vessel at a constant temperature. The corrosion rates are determined either by actual weight loss of steel coupons... 

The reliability of this real life experience is corroborated by the results of laboratory research. American Society for Testing and Materials (ASTM) C581 [6] is designed to reflect the resin deterioration when a laminate is totally immersed in a corrosive medium. Central to the procedure is the strict specification of a standard laminate and of standard conditions for exposing samples to corrosive liquids. The method specifies determining the hardness and flexural properties of the laminates at 1, 3, 6 and 12 months. 

Taking these aspects into consideration, the potential for application of Mossbauer spectrometry to corrosion studies is now demonstrated for three accelerated corrosion tests in chloride environments total immersion, dry-wet cycles, and outdoor tests. 

It is worth mentioning that at 0.6 M NaCI concentration for 46 days, the corrosion rate for CS and WS were of 3l00 xm per year and 3686 xm per year, respectively. For comparison purposes, it is possible to see that the performance of both steels in such aggressive environments of high chloride content is very poor, but it is even three to five times worse than in the case of total immersion tests. These corrosion rates seem to be inversely related to the iron conversion factor, which is lower (about 0.21) in the immersion tests than in the dry-wet tests (about 0.80). The different behaviors should be related to the type of iron phases, their characteristics, and their relative amounts. 

The history of airplane corrosion testing includes many successful tests that are now performed routinely, e.g., ASTM G 85 Annex A2 and ASTM G 44. Some other successful tests, such as the wedge test (ASTM D 3762, Test Method for Adhesive-Bonded Surface Durability of Aluminum), discovered as a result of bond line corrosion problems on airplanes, are not described here because they are not strictly corrosion tests. Many of the tests described here are ASTM standards. With others, standardization is being pursued, e.g., electrochemical impedance, or ANCIT (Aluminum-Nitrate Chloride Immersion Test), to replace EXCO [4], Corrosion may never be totally eliminated from an airplane however, further refinements in corrosion testing, made... 

Standard Practice for Static Immersion Testing of Unstressed Materitds in Nitrogen Tetroxide (N2O4) Standard Test Method for Corrosion of Aircraft Metals by Total Immersion in Maintenance Chemicals... 

Corrosion tests have been conducted on 1 inch x 2 inch furan polymer concrete test cylinders made with Quaker s QO FA-RoK resin/catalyst system by totally immersing them in several key media at 1 SOT for one year. Results of these tests indicate that furan polymer concrete should be suitable for use in environments that have been serviced for many years by furan mortars and furan FRP equipment. 

A scratch was created on the coated specimen using a rod with a diamond tip on a scratch tester (IMC-1552, Imoto Machinery Co. Ltd.). The load for the scratch was 30 g. The scratched specimen was put in a holder and connected to a conductive wire, followed by immersion in a 0.0005 M NaCl corrosive solution, maintained at 40°C. The electrochemical impedance spectroseopy of the scratched specimen was measured at intervals of 4 h, or more, for a total of 24 h. Measurement data were analysed to calculate the polarisation resistance after the test. Scratched specimens were also immersed in a 0.0005 M NaCl corrosive solution at 40°C for 7 days. The surface appearance of the specimens was observed after the corrosion test to confirm the self-healing properties of the coatings. The seratched part of the specimen was analysed after the corrosion test by Electron Probe Micro-Analysis (EPMA). 

Alternate immersion test using an aqueous solution containing 2.86% NaCl plus 0.52% magnesium chloride (total chloride equal to that in ocean water) proposed in Ref 39 as a less corrosive substitute for 3.5% NaCl solution for ASTM G44... 

Maconachie (1934) noted that Cox s results applied only to a 15-day test and did not define the influence of duration of exposure within this time. Maconachie immersed 99.99% zinc specimens in distilled water aerated by movement of the test assembly for 7 days at temperatures of SO-SO C. Weight losses were determined on specimens removed at daily intervals. At 20°C the distilled water had a pH of 5.2, largely as a result of dissolved carbon dioxide. At the higher test temperatures, however, the pH was probably higher as the carbon dioxide was expelled from the solution. The total corrosion as a function of temperature is shown at daily intervals in Fig. 3.4. The general shapes of the curves resemble those reported by Cox (1931) for 15 days and... 

Specimens of galvanized steel partially immersed in commercially pure test chemicals at ambient temperature for a minimum of 100 days corrosion rate based on total area of specimen. 

Alternate Immersion in 3.5% NoCl. Exposure to 3.5% sodium chloride or to substitute ocean water (ASTM D 1141) by alternate immosion (ASTM G 44) (see Table 1) is a widely used procedure for testing smooth specimens of aluminum alloys. Aeration of the specimens, achieved by the alternate immersion, enhances the corrosion potential (Ref 26) and produces more rapid SCC of most aluminum alloys than continuous immersion. The ASTM G 44 standard practice consists of a 1 h cycle that includes a 10 min soak in the aqueous solution followed by a SO min period out of solution in air at 27 °C (80 °F) and 45% relative humidity, during which time the specimens are air dried, lliis 1 h cycle is repeated continuously for the total number of days recommended for the particular alloy being tested. IVpically, aluminum alloys are exposed from 10 to 90 days, depending on the resistance of the alloy to corrosion by salt water. This test ntethod is widely used for testing most types of aluminum alloys with all types of smooth specimens. 

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