阅读题目 时间 2014 An study accelerated 02 corrosion 18 2013 testing 室内试验方法 on 1. Cebelor cyclic test 实验材料 WS和CS(ASTM A 242 Type 1 specification), test specimens measured 70*30 mm and were 2 and 8 mm thick, 准备实验、 除锈方法 1.removing the millscale layer by sand blasting to ASa3 finish； 2.cleaning with detergent and high purity water in an ultrasonic bath； 3.successive rinsing with high purity water, ethanol and acetone in an ultrasonic bath, 4.finally drying with hot compressed air. 做的实验 1.tensile testing with a MicroTest Model EM2/100/FR testing machine ( standard ISO 62-1 2010) 2．Atmospheric corrosion station located in the city of Madrid, on the roof terrace of the National Centre for Metallurgical Research (CENIM) with corrosivity category C2-3, according to ISO 9223 [33], and environmental parameters: SO2 =1.0 ug m-3, Cl-=3.3mg m-2 d-1, and Time of Wetness (TOW) =28%.The specimens were exposed for three years;（这是室外实验） Immersion for 30 min in a 1.0*10-2MNa2SO4 solution followed by emersion and drying for 60 min by controlled of IR radiation at a temperature of 40℃ [29]. Na2SO4 instead of NaHSO3 was used for a better simulation of rural and urban atmospheres. The test was run for 7 cycles/day-1 during 90 days (630 cycles). 2. Kesternich cyclic test weathering steel 24-h cycles divided into two parts, consisting of a first stage of 8 h exposure in an atmosphere with a 0.2 L of sulphur dioxide (SO2)at a temperature of 42 _C and a relative humidity of 100%, and a second stage of 16 h in ambient conditions as described in standard ISO 3231 [21] and ISO 6988 [22].The test duration was 90 days (90 cycles). 3. Prohesion cyclic test Continuous exposure to alternate cycles of 1 h spraying with a 0.35% (NH4)2SO4 and 0.05% NaCl solution followed by 1 h drying at a temperature of 35 _C, according to standard ASTM G85 [34]. According to this standard, the apparatus used consists of a spray cabinet, an adjustable heater adequate to maintain the cabinet and its contents at the specified temperature and a spraying device comprising a supply of clean compressed air of constant pressureand humidity. 4.文中有关于试验周期的表格 2014 02 19 1997 The corrosion mechanisms of carbon steel and weathering steel in SO2 polluted atmospheres We consequently developed an accelerated corrosion testing procedure that is an alternating wet-dry experiment under a constant SO2 concentration in the gas phase. Each wet/dry cycle consists of a wetting period (6 h at 20 ℃, RH 100%) plus a drying period (18 h at 50℃, RH 20%). SO2 was provided only during the wetting period, from a cylinder of sulfur dioxide mixed with nitrogen for diiution, and the SO2 level in the test chamber was controlled at 1 and 4 ppm, respectively 15 X 15 X 4 mm for laboratory accelerated tests； polished down to 600 grade emery paper, cleaned ultrasonically in acetone and then rinsed with distilled water. 2013 11 29 2013 Influence alloyed chromium of Each cycle of wet/dry cyclic corrosion test lasted for 1 h and included two stages: 1.19块试验样品，1号是碳素钢，2号是普通耐候钢，其他的成分列在表格中 2.Rectangular specimens with 1. mechanically ground on SiC papers in succession up to 800# grit 2. treated by decreasing, cleaning on (1)immersing the specimens into 0.01 M NaHSO3 aqueous solution with the pH value of 4.4 at 45℃ for 12 min the atmospheric corrosion resistance of (2)drying the specimens immediately after immersion by weathering steels six heating lamps (the surface temperature of the specimens was lower than 75℃),subsequently holding the specimens in the testing chamber with a constant humidity of RH 75% (±5%) at 45℃ totally for 48 min dimensions 60*40*5mm3 of and rinsing in acetone and then dried