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首页> 外文期刊>JCT research >Exterior wood coatings. Part-1: Performance of semitransparent stains on preservative-treated wood
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Exterior wood coatings. Part-1: Performance of semitransparent stains on preservative-treated wood

机译：外墙木器涂料。第一部分：半透明污渍在防腐剂处理木材上的性能

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Pressure-treated lumber available for residential applications had been changed from chromated copper arsenate (CCA) treatment to Cu-amine formulations (since January 2004). This change created a need to investigate the performance of coatings on these new Cu-based preservatives as compared with CCA. This study evaluated performance of a number of semitransparent deck stains on CCA, alkaline copper quat (ACQ), copper azole (CA), and untreated wood samples during 3 years of natural weathering. Coatings were evaluated for their ability to reduce water uptake, color change, checking of wood, and mildew growth and to improve general appearance of preservative-treated wood samples. Overall, Cu-amine-treated wood had on average 50% higher water uptake than CCA-treated wood samples. Although solvent-based coatings had better water repellency performance on CCA-treated and untreated wood, there was no significant difference in water-repellent effectiveness (WRE) between water-based and solvent-based coatings on ACQ- or CA-treated wood. All preservative-treated woods had less color change and better visual ratings than those of untreated wood samples. Based on image analysis which was used to determine the total area of surface checking on samples after 3 years, preservative treatments had no significant effect on reducing checking of wood while coatings reduced surface checking by 300%.
机译：自2004年1月起，已将用于居民区的经过压力处理的木材从砷化铬酸铜（CCA）处理改为铜胺配方。与CCA相比，这种变化导致需要研究这些新型铜基防腐剂上的涂料性能。这项研究评估了3年自然风化期间，CCA，碱性铜季铵盐（ACQ），铜唑（CA）和未经处理的木材样品上许多半透明甲板污渍的性能。评估了涂料减少水分吸收，颜色变化，木材检查和霉菌生长以及改善防腐剂处理的木材样品的整体外观的能力。总体而言，铜胺处理过的木材的吸水率比CCA处理过的木材样品平均高50％。尽管溶剂型涂料在经过CCA处理和未处理的木材上具有更好的拒水性能，但ACQ或CA处理的木材上的水基涂料和溶剂型涂料之间的拒水效果（WRE）没有显着差异。与未经处理的木材样品相比，所有经过防腐剂处理的木材均具有较少的颜色变化和更好的视觉评级。根据用于确定3年后样品表面检查总面积的图像分析，防腐处理对减少木材检查没有显着影响，而涂料将表面检查减少了300％。

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