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Humidity cabinets

The CASS Test. In the copper-accelerated acetic acid salt spray (CASS) test (42), the positioning of the test surface is restricted to 15 2°, and the salt fog corrosivity is increased by increasing temperature and acidity, pH about 3.2, along with the addition of cupric chloride dihydrate. The CASS test is used extensively by the U.S. automobile industry for decorative nickel—chromium deposits, but is not common for other deposits or industries. Exposure cycle requirements are usually 22 hours, rarely more than 44 hours. Another corrosion test, now decreasing in use, for decorative nickel—chromium finishes is the Corrodkote test (43). This test utilizes a specific corrosive paste combined with a warm humidity cabinet test. Test cycles are usually 20 hours. [Pg.151]

Fig. 4.17 Samples of high-purity AZ31 (upper photographs) and ZW3 (lower photographs) magnesium-base alloys, fitted with mild-steel nuts and bolts and exposed to a variety of corrosion conditions, (a) 4-S hours immersion in 37 salt soln., (b) 180 days immersion in distilled water, (c) 4 days immersion in borehole water, (d) 180 days in humidity cabinet sea-water spray and (e) 180 days atmospheric exposure... Fig. 4.17 Samples of high-purity AZ31 (upper photographs) and ZW3 (lower photographs) magnesium-base alloys, fitted with mild-steel nuts and bolts and exposed to a variety of corrosion conditions, (a) 4-S hours immersion in 37 salt soln., (b) 180 days immersion in distilled water, (c) 4 days immersion in borehole water, (d) 180 days in humidity cabinet sea-water spray and (e) 180 days atmospheric exposure...
D 1748 1983 Test method for rust protection by metal preservatives in the humidity cabinet... [Pg.1099]

Decarboxylative polymerisation of the N-carboxyanhydride can be brought about in two ways, the first being the use of a humidity cabinet [15] and the second involving the use of a suitable amine initiator, (Scheme 5). [Pg.128]

The relative aggressiveness of the environments proved to be consistent for all substrates, with the room temperature control the least hostile (virtually no loss of adhesion), and the cycle tests the most aggressive (up to 100% loss of adhesion within 60 days). Humidity cabinet exposure and 60°C water immersion yielded very similar values. As a result, for reasons of clarity, only water immersion data is actually presented here. Joint strength data obtained from either the Ford APG or Fisher Body Cycle Tests were identical, and were therefore also represented by one set of data points. The relative aggressiveness of the host environments toward... [Pg.183]

Provided using saturated aqueous solutions of MgBr2, controlled humidity cabinets. KNO2, NaBr, NaQ, KNO3, respectively, or... [Pg.92]

The rather more sophisticated injection type of humidity cabinet uses a humidity sensitive device to control the injection of moisture into the cabinet from a reservoir. Humidity levels are rather more easily controlled and changed with this type of apparatus and some types have the means to cycle both humidity and temperature in a prescribed manner, so extending the range of tests which can be carried out. [Pg.57]

Provided using saturated aqueous solutions respectively, or controlled humidity cabinets. [Pg.103]

The more sophisticated injection-humidity cabinet permits a wide variation in temperature and humidity to be created with a few simple settings of the controls. The humidity is measured by a suitable moisture sensor, such as a wet and dry bulb hygrometer or capacitive sensor, and this is used to control the injection of moisture into the chamber. Through the use of suitable control circuits it is also possible to cause such a chamber to cycle in temperature and/or humidity so that varying ambient conditions over wide extremes may be simulated for assessing such effects on the environmental resistance of polymer products. [Pg.145]

After the introduction of combustion-modified polyurethane foam into the upholstery and bedding market, a wet compression set method, BS 4443, Part 7. Method 18, has become much more widely used. This is carried out by using a humidity cabinet set at 40 C and 95 100% relative humidity. Apart from recommending the use of a stainless steel compression apparatus, the only major difference from EN ISO 1856, 1996 is that the compression is carried out at 70% of the original thickness as opposed to the more normal 75%. This slight discrepancy arises becau.se of the original test methods devised by the automotive trade. [Pg.402]

Note Dynamic tests conducted in humidity cabinet having complete change of atmosphere every 3 minutes. Surface area to weight ratios of large Petri dish, small Petri dish, and vial were 17.0, 2.4, and 0.25, respectively. [Pg.789]

Cleveland condensing humidity cabinet (QCT) n. An accelerated weathering apparatus which operates on a condensation type of water exposure at elevated temperature. [Pg.196]

Strekalov and Berukshtis concluded that sea fog and warmth and humidity cabinets satisfactorily reproduce the nature of corrosive destruction of anodic coatings on steel, as observed under natural conditions in nonindustrial zones. Accelerated tests in SO2 gas cabinets were too harsh, however, and did not reliably reflect the behavior of zinc and cadmium coatings in a natural industrial atmosphere. [Pg.192]

Standard Test Method for Rust Protection by Metal Preservatives in the Humidity Cabinet... [Pg.132]

Monday Only 1 h 60C In air circulating oven 30 min cold cabinet (-2SC) 15 min 5% NaCI Immeiaion 21 h humidity cabinet (60C, 85% RH)... [Pg.627]


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See also in sourсe #XX -- [ Pg.57 ]

See also in sourсe #XX -- [ Pg.145 ]




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Humidity Cabinet Tests

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