The present study compares prerequisites for cavitation-resistant bronzes production by different coating techniques, namely cold spraying, HVOF spraying, warm spraying and arc spraying. If optimized to maximum cavitation resistance, the deposited coatings can increase the service life of ship rudders significantly. Furthermore, these methods could enable repair processes for ship propellers. This study is meant to help selecting the right coating technology to achieve best cavitation protection for a given set of requirements. Using high-pressure warm spraying and cold spraying, properties similar to those of cast nickel aluminum bronze are achieved. Also, coatings produced by using HVOF and arc spraying have erosion rates that are only about four, respectively, three times higher as compared to cast nickel aluminum bronze, while by far outperforming bulk shipbuilding steel. Their properties should be sufficient for longer service life, i.e., less docking events for ship rudder repair. Hence, with respect to costs, HVOF and arc spraying could represent a good compromise to reach the specified coating properties needed in application, potentially even for propeller repair.

本研究比较了通过不同的涂层技术（即冷喷涂，HVOF喷涂，暖喷涂和电弧喷涂）生产抗气蚀性青铜的先决条件。如果进行优化以最大程度地提高抗气蚀性，则沉积的涂层可以显着延长船舵的使用寿命。此外，这些方法可以使船舶螺旋桨的维修过程成为可能。这项研究旨在帮助选择正确的涂层技术，从而针对给定的一组要求实现最佳的防气蚀性能。通过使用高压热喷涂和冷喷涂，可获得与铸造镍铝青铜相似的性能。此外，使用HVOF和电弧喷涂生产的涂层的腐蚀速率分别仅为铸铁镍铝青铜的大约四倍，三倍，而远远胜过散装造船用钢材。它们的特性应足以延长使用寿命，即减少船舵维修的对接事件。因此，就成本而言，HVOF和电弧喷涂可能是一种很好的折衷方案，以达到应用中所需的指定涂层性能，甚至可能用于螺旋桨维修。