The layer-wise deposition of the laser powder bed fusion (L-PBF) process offers a tailorable microstructure with anisotropic properties. This research aimed to investigate the contribution of crystallographic texture on the anisotropic electrochemical/corrosion behavior of a L-BPF processed commercially pure nickel (Ni) cube along surfaces oriented parallel and perpendicular to the building direction. In order to exclusively assess the role of crystallographic texture on the corrosion behavior, the electrochemical measurements were performed on different surfaces of the L-PBF processed cube in alkaline and acidic chloride-free solutions. Orientation microscopy analysis showed that the morphology of grains along the parallel surface to the building direction was columnar, and their crystallographic orientation distribution was uniform. In contrast, the morphology of grains on the surface aligned normal to the building direction was equiaxed and highly oriented toward [110]. This bias in the orientation distribution led to the highest residual affinity for oxidation in comparison to the other planes in the FCC (Face Centered Cubic) crystal structure. In the case of 1 M NaOH solution, the hydroxide layer formed at the exposed surface did not effectively control the cation ejection from the surface. Also, surfaces oriented normal to the building direction, with lower surface atomic density, showed an elevated dissolution rate. Conversely, in the case of 1 M H₂SO₄ solution, a more integrated and thicker oxide film formed in comparison to the surface aligned parallel to the building direction. This fact led to reduced surface dissolution. This study shows that engineering the topology and microstructure based on the desired properties can remarkably promote the performance of additively manufactured materials in extreme environments.

激光粉末床熔合（L-PBF）工艺的逐层沉积可提供具有各向异性特性的可定制微结构。这项研究旨在调查晶体结构对L-BPF加工的商用纯镍（Ni）立方体沿平行于和垂直于建筑方向定向的表面的各向异性电化学/腐蚀行为的贡献。为了专门评估晶体织构对腐蚀行为的作用，在无碱和酸性氯化物溶液中对L-PBF处理的立方体的不同表面进行了电化学测量。取向显微镜分析表明，晶粒沿着与构建方向平行的表面的形态是柱状的，并且其晶体学取向分布是均匀的。相反，垂直于建筑方向排列的表面上的晶粒形态是等轴的，并且高度朝向[110]。与FCC（面心立方）晶体结构中的其他平面相比，取向分布的这种偏向导致对氧化的最高残留亲和力。在1M NaOH溶液的情况下，在暴露的表面上形成的氢氧化物层不能有效地控制阳离子从表面的喷射。同样，垂直于建筑方向定向的表面具有较低的表面原子密度，其溶出速率也有所提高。相反，在1 MH的情况下 与FCC（面心立方）晶体结构中的其他平面相比，取向分布的这种偏向导致对氧化的最高残留亲和力。在1M NaOH溶液的情况下，在暴露的表面上形成的氢氧化物层不能有效地控制阳离子从表面的喷射。同样，垂直于建筑方向定向的表面具有较低的表面原子密度，其溶出速率也有所提高。相反，在1 MH的情况下 与FCC（面心立方）晶体结构中的其他平面相比，取向分布的这种偏向导致对氧化的最高残留亲和力。在1M NaOH溶液的情况下，在暴露的表面上形成的氢氧化物层不能有效地控制阳离子从表面的喷射。同样，垂直于建筑方向定向的表面具有较低的表面原子密度，其溶出速率也有所提高。相反，在1 MH的情况下_在2 SO ₄溶液中，与平行于建筑物方向排列的表面相比，形成了更完整，更厚的氧化膜。这一事实导致减少的表面溶解。这项研究表明，根据所需特性设计拓扑和微观结构可以显着提高增材制造材料在​​极端环境下的性能。