Official Answer
Answer
Black oxide (MIL-DTL-13924) provides minimal corrosion resistance (mostly for aesthetics and light oil retention) and has negligible impact on fatigue. Zinc Phosphate (heavy phosphate), however, provides a porous crystalline structure that holds much more corrosion-inhibiting oil, offering significantly better salt spray resistance. ຢ່າງໃດກໍຕາມ, ຂະບວນການຟອສເຟດກ່ຽວຂ້ອງກັບຂັ້ນຕອນການດອງອາຊິດທີ່, ຄືກັບການຊຸບ, ສາມາດເຮັດໃຫ້ເກີດການຍ່ອຍສະຫຼາຍຂອງໄຮໂດເຈນ. Furthermore, for high-cycle fatigue applications, the crystalline structure of phosphate can act as a micro-abrasive if the ring is subjected to vibration. ສໍາລັບຊີວິດທີ່ເມື່ອຍລ້າສູງສຸດໃນສະພາບແວດລ້ອມທີ່ມີການກັດກ່ອນເລັກນ້ອຍ, ການຈຸ່ມນ້ໍາມັນແບບງ່າຍດາຍຫຼືປ່ຽນເປັນ 302SS ແມ່ນມັກ.
