Abstract The performance of stainless steel brackets, adhesively mounted with a soft polyurethane-based accelerated 1-component adhesive onto completely coated steel substrates, is investigated. The investigated joint connections on typical marine top coats, namely polyurethane, polysiloxane and epoxy, exhibited a high mechanical stability even after accelerated ageing (salt spray exposure, cyclic temperature variations, high relative humidity). Tensile strength and shear strength criteria for a designed loading capacity of 50 kg were achieved with a safety factor of >10. All failure strength values were lower than the adhesion strength of the coatings to the steel. The adhesive material maintained its high deformability after ageing. The torsional rigidity of the adhesive joint exceeded the required clamping torque of the designed bolt. A cyclical lifetime of >9·106 load cycles was estimated. Effects of cyclic ageing on the creep performance of the adhesive joint were found to be insignificant. All adhesive joint connections met the requirements for a safety factor for the design for marine applications. Under sealed conditions, the ingress of moisture and chloride was avoided, and deterioration mechanisms typical for unsealed joints in marine environments (e.g. moisture penetration, adhesive material plastification, interfacial delamination) did not take place. Effects of mechanical and structural parameters as well as surface parameters of the top coat materials on the performance of the joints were statistically insignificant.

中文翻译：

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加速老化对海洋应用不锈钢和聚合物面漆材料之间粘合接头机械性能的影响

摘要 研究了用软聚氨酯基加速单组分粘合剂粘合安装到完全涂层钢基材上的不锈钢支架的性能。研究的典型船用面漆（即聚氨酯、聚硅氧烷和环氧树脂）上的接头连接即使在加速老化（盐雾暴露、循环温度变化、高相对湿度）后仍表现出高机械稳定性。达到了设计承载能力为 50 kg 的拉伸强度和剪切强度标准，安全系数 >10。所有破坏强度值都低于涂层对钢的粘附强度。粘合剂材料在老化后保持其高变形能力。粘合接头的扭转刚度超过了设计螺栓所需的夹紧扭矩。估计循环寿命大于 9·106 个负载循环。发现循环老化对粘合接头蠕变性能的影响是微不足道的。所有粘合接头连接均满足船舶应用设计的安全系数要求。在密封条件下，避免了水分和氯化物的进入，并且不会发生海洋环境中未密封接头的典型劣化机制（例如水分渗透、粘合剂材料塑化、界面分层）。机械和结构参数以及面漆材料的表面参数对接头性能的影响在统计上是不显着的。发现循环老化对粘合接头蠕变性能的影响是微不足道的。所有粘合接头连接均满足船舶应用设计的安全系数要求。在密封条件下，避免了水分和氯化物的进入，并且不会发生海洋环境中未密封接头的典型劣化机制（例如水分渗透、粘合剂材料塑化、界面分层）。机械和结构参数以及面漆材料的表面参数对接头性能的影响在统计上是不显着的。发现循环老化对粘合接头蠕变性能的影响是微不足道的。所有粘合接头连接均满足船舶应用设计的安全系数要求。在密封条件下，避免了水分和氯化物的进入，并且不会发生海洋环境中未密封接头的典型劣化机制（例如水分渗透、粘合剂材料塑化、界面分层）。机械和结构参数以及面漆材料的表面参数对接头性能的影响在统计上是不显着的。海洋环境中未密封接头的典型退化机制（例如水分渗透、粘合材料增塑、界面分层）没有发生。机械和结构参数以及面漆材料的表面参数对接头性能的影响在统计上是不显着的。海洋环境中未密封接头的典型退化机制（例如水分渗透、粘合材料增塑、界面分层）没有发生。机械和结构参数以及面漆材料的表面参数对接头性能的影响在统计上是不显着的。