GB/T 21839-2019预应力混凝土用钢材应力腐蚀试验:6个钢材试件用于应力腐蚀试验,测定钢材在一恒定拉力情况下,浸在给定的恒定温度的硫氰酸盐溶液中直至断裂时所用的时间。HRJ Tester刚性机架试验机,载荷作用于封闭框架的水平方向。时间测量装置0.01h分辨率,自动控制、停止、保留、记录断裂时间,精确度±0.1h。HRJ Tester;圆柱形溶液腐蚀容器,进口容器材料耐高温、耐腐蚀,两端紧密封闭,无泄漏,保证无空气进入。试样直径≤19mm,试验容器内径>70mm,试样直径19<d≤50mm,试验容器内径>100mm。
50kN~1000kN钢材应力腐蚀试验机,浸在溶液中钢材应力腐蚀试样长度Le>200mm,至少50mm长的部分应用涂漆等防止腐蚀的方法进行防护。HRJ Tester;每次测试时溶液都要重新更换,试验溶液预先加热到50℃~55温度,再注入容器中。溶液体积应保证沿着试样长度每平方厘米表面有5mL。溶液填充应在1min内完成,然后计时装置开始计时t0。测试中溶液不能循环流动。
钢材应力腐蚀试验,在时间t0到(t0+5)min内,对于钢丝及钢绞线溶液的温度应调整到(50±1)℃;对于钢棒溶液温度应调整到(50±2)℃;在试验中温度应保持在相应温度范围内。HRJ Tester;在试样发生断裂或达到规定时间时,试验被认为完成。jnshiyanji.com;在测试钢绞线时,当钢丝发生断裂时试验终止。如果试样的断裂发生在测试长度L0以外,试验判定无效。
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济南恒瑞金试验机有限公司;应力腐蚀试验机制造商;山东省力值硬度计量委员
(试验机服务中心)(试验机配件供应中心)(特殊夹具定制中心)
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