Phosphate and silane containing organic self–assembled (SA) layers serve as pre–treatments on magnesium alloy sheet materials. A reliable protection was achieved in this work via application of alkyd–based coatings on the pretreated surface. The idea of adopting SA pre–treatments as functional layers at metal–polymer interface is to influence the adhesive properties between solid metal substrate and alkyd–based coating. Hexadecyltrimethoxysilane (HDTMS) deposited metal surfaces exhibit stronger adhesive strength, while a near homogeneous distribution of the octadecylphosphonic acid (ODPA) and perfluorodecylphosphonic acid (PFDPA) exhibit low adhesive phenomenon, when placed as pre–layers in bilayer coatings. Electrochemical impedance results after 168 h of immersion reveal that the organophosphate and organosilane deposited bilayer films demonstrate protective properties with almost no interface defects. Moreover, organophosphate treated bilayer coatings enhance easy peeling of alkyd coat after protecting the surface from corrosive electrolytes. Bilayer coatings developed on AZ31 sheets can confer temporary or long–term corrosion protection depending on further processing strategy and offer efficient alloy protection for both purposes.

含磷酸盐和硅烷的有机自组装 (SA) 层用作镁合金板材的预处理。在这项工作中，通过在预处理表面上应用醇酸基涂料，实现了可靠的保护。在金属-聚合物界面采用 SA 预处理作为功能层的想法是影响固体金属基材和醇酸基涂层之间的粘合性能。十六烷基三甲氧基硅烷 (HDTMS) 沉积的金属表面表现出更强的粘合强度，而近乎均匀分布的十八烷基膦酸 (ODPA) 和全氟癸基膦酸 (PFDPA) 在作为双层涂层的前层放置时表现出低粘合现象。浸泡 168 小时后的电化学阻抗结果表明，有机磷酸盐和有机硅烷沉积的双层膜显示出几乎没有界面缺陷的保护性能。此外，有机磷酸盐处理过的双层涂层在保护表面免受腐蚀性电解质的影响后，增强了醇酸涂层的易剥离性。在 AZ31 板材上开发的双层涂层可以根据进一步的加工策略提供临时或长期的腐蚀保护，并为这两种目的提供有效的合金保护。