The ambient pressure is increasing with depth of ocean, however there are few studies about the effect of the pressure on the tribocorrosion behavior. Thus, the influence of hydrostatic pressure on the tribocorrosion behavior of the HVOF WC-10Co-4Cr coating sliding against Si₃N₄ was studied. Hydrostatic pressures were 0, 20, 40, 60, and 80 MPa, respectively. Experimental results indicate that the hydrostatic pressure has insignificant effect on the friction coefficient of the tribo-pair. At 1500 rpm, the friction coefficient increases from 0.0215 to 0.0282 when the pressure rises from 0 to 40 MPa, and the difference between the maximum and the minimum wear rate is only 0.6 × 10⁻⁸ mm³/Nm, implying that the tribo-pair has good adaptability to different hydrostatic pressures. The results of potentiodynamic scanning show that the hydrostatic pressure has a slight promoting effect on the corrosion rate of WC-10Co-4Cr.Under corrosion-only condition, the corrosion rate increases from 0.006 mm/a to 0.0143 mm/a when the pressure ranges from 0 to 80 MPa. Friction promotes the corrosion behavior of WC-10Co-4Cr coating. Under tribocorrosion condition, depassivation of Cr and Co elements in WC-10Co-4Cr coating accelerates the dissolution of the worn zone and crevice corrosion, leading to the corrosion rate increases from 0.0112 mm/a to 0.0296 mm/a with the rising pressure. The wear mechanism of WC-10Co-4Cr is that the corrosion of the CoCr binder phase leads to the shedding of WC particles and part of the abrasive wear.

环境压力随着海洋深度的增加而增加，但是关于压力对摩擦腐蚀行为的影响的研究很少。因此，研究了静水压力对 HVOF WC-10Co-4Cr 涂层对 Si ₃ N ₄滑动的摩擦腐蚀行为的影响。静水压力分别为 0、20、40、60 和 80 MPa。实验结果表明，静水压力对摩擦副的摩擦系数影响不大。1500 rpm时，压力从0上升到40 MPa时，摩擦系数从0.0215增加到0.0282，最大和最小磨损率之差仅为0.6×10 ^-8  mm ³/Nm，说明摩擦副对不同的静水压力具有良好的适应性。动电位扫描结果表明，静水压力对WC-10Co-4Cr的腐蚀速率有轻微的促进作用。在纯腐蚀条件下，当压力范围内，腐蚀速率从0.006 mm/a增加到0.0143 mm/a。从 0 到 80 兆帕。摩擦促进了WC-10Co-4Cr涂层的腐蚀行为。在摩擦腐蚀条件下，WC-10Co-4Cr涂层中Cr和Co元素的去钝化加速了磨损区的溶解和缝隙腐蚀，导致腐蚀速率随着压力的升高从0.0112 mm/a增加到0.0296 mm/a。WC-10Co-4Cr的磨损机理是CoCr结合相的腐蚀导致WC颗粒脱落和部分磨粒磨损。