The influence of ultra-thin SiO_x plasma deposited films on the corrosion resistance of adhesive films on a laser surface melted 7075 aluminium alloy was investigated by means of complementary techniques in comparison to the just laser surface melted state. Laser surface melting (LSM) was performed using a continuous wave mode at a wavelength of 1064 nm. Ultra-thin plasma polymer films were deposited from a mixture of hexamethyldisilane (HMDSO), oxygen, and argon by means of an audio-frequency glow discharge. The surface morphology and surface chemistry compositions were investigated by employing field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), diffuse reflection infrared Fourier transform spectroscopy, and X-ray photoelectron spectroscopy. The corrosion resistance of plasma polymer coated LSM Al-7075 alloy was studied using linear sweep voltammetry and electrochemical impedance spectroscopy in a chloride-containing electrolyte. The electrochemical studies showed an improved corrosion resistance for plasma film-coated alloys compared to the just laser surface melted state. To study the corresponding surface adhesive properties, the samples were coated with an epoxy amine adhesive. 90°-peel test under humid conditions confirmed the improvement of interfacial wet-adhesion corrosion tests showed a strong improvement of the delamination resistance of adhesives caused by the ultra-thin interfacial SiO_x-films.

超薄SiO _x的影响等离子沉积薄膜对激光表面熔化 7075 铝合金粘膜耐腐蚀性的影响通过互补技术与激光表面熔化状态进行比较。使用波长为 1064 nm 的连续波模式进行激光表面熔化 (LSM)。通过音频辉光放电从六甲基二硅烷 (HMDSO)、氧气和氩气的混合物中沉积超薄等离子体聚合物薄膜。采用场发射扫描电子显微镜、能量色散 X 射线光谱 (EDX)、漫反射红外傅立叶变换光谱和 X 射线光电子能谱研究了表面形态和表面化学成分。使用线性扫描伏安法和电化学阻抗谱在含氯化物电解质中研究了等离子体聚合物涂层的 LSM Al-7075 合金的耐腐蚀性。电化学研究表明，与激光表面熔化状态相比，等离子薄膜涂层合金的耐腐蚀性能有所提高。为了研究相应的表面粘合性能，样品涂有环氧胺粘合剂。潮湿条件下的 90° 剥离试验证实了界面湿粘附腐蚀试验的改善表明超薄界面 SiO 对粘合剂的抗分层性有很大改善 电化学研究表明，与激光表面熔化状态相比，等离子薄膜涂层合金的耐腐蚀性能有所提高。为了研究相应的表面粘合性能，样品涂有环氧胺粘合剂。潮湿条件下的 90° 剥离试验证实了界面湿粘附腐蚀试验的改善表明超薄界面 SiO 对粘合剂的抗分层性有很大改善 电化学研究表明，与激光表面熔化状态相比，等离子薄膜涂层合金的耐腐蚀性能有所提高。为了研究相应的表面粘合性能，样品涂有环氧胺粘合剂。潮湿条件下的 90° 剥离试验证实了界面湿粘附腐蚀试验的改善表明超薄界面 SiO 对粘合剂的抗分层性有很大改善_x-电影。