环境因素对微小开口裂纹渗透性的影响

锅炉压力容器投运后，长期受到温度、腐蚀介质、交变应力作用，易产生疲劳、蠕变、应力腐蚀等裂纹。考虑现场实际环境因素，主要以温度差和大气压力对微小开口裂纹渗透性的影响进行理论研究，结合高原高海拔、温差大的特点对渗透工艺进行分析改进，为高原地区进行渗透检测技术提供参考。

Effect of Environment Factor on Permeability of Mini Open Crack

After the boiler pressure vessels putting into operation, it affected by temperature, corrosion dielectric, alternating stress, brings fatigue cracking, creep cracking and stress corrosion cracking etc. Considering actual environment factor on site, the paper mainly researches the effect of temperature difference and atmosphere pressure on permeability of mini open crack, and analyses osmosis craft combining with characteristic of high altitudes and great temperature difference, it provides reference for osmosis detection technique on plateau area.