CAJ | 학술논문

摘要：为提高钛管件的耐腐蚀性能及抗冲刷磨损性能，研究了在具有复杂形状钛管件内表面制备氧化铝陶瓷涂层的新方法。先通过爆炸焊接制备了Ti／Al双金属复合管，再将其成形为复杂管件，接着通过微弧氧化将复合管件的铝层进行陶瓷化处理，从而将铝层部分转化为氧化铝层。采用XRD、SEM对氧化铝层的相组成及形貌进行了分析，并对氧化铝层与基体的结合强度、耐腐蚀性能和耐冲刷性能进行了表征。结果表明：涂层主要由γ-A12O3及α—A1203组成，其中γ-A12O3的厚度约为40／μm，α-A1203。的厚度约为10μm；陶瓷涂层与基体结合力达55N，涂层腐蚀电流比钛基体降低5个数量级。另外，氧化铝陶瓷涂层可以有效地防护基体被冲刷。
적요：위제고태관건적내부식성능급항충쇄마손성능，연구료재구유복잡형상태관건내표면제비양화려도자도층적신방법。선통과폭작한접제비료Ti／Al쌍금속복합관，재장기성형위복잡관건，접착통과미호양화장복합관건적려층진행도자화처리，종이장려층부분전화위양화려층。채용XRD、SEM대양화려층적상조성급형모진행료분석，병대양화려층여기체적결합강도、내부식성능화내충쇄성능진행료표정。결과표명：도층주요유γ-A12O3급α—A1203조성，기중γ-A12O3적후도약위40／μm，α-A1203。적후도약위10μm；도자도층여기체결합력체55N，도층부식전류비태기체강저5개수량급。령외，양화려도자도층가이유효지방호기체피충쇄。
A new combined process of preparing the A12O3 coatings on the inner surface of TA1 pipefittings with complicated shape was developed to improve the resistance of scouring abrasion and corrosion of substrate. The new process mainly included explosive welding, plastic forming and micro-arc oxidation. The phase composition and topography of A12 O3 coatings were investigated by X--ray diffraction（XRD）,scanning electron microscopy（SEM）,respectively. Bonding strength, corro sion resistance and anti scouring property of the coatings were also measured. The results indicate that the coatings are composed of ]＇--A12Oa and a-A12O3 with the thickness of 40/μm and 10/μm,respec- tively. The bonding strength can reach 55N between the prepared A12Oa coatings and TA1 substrate. The corrosion eurrent of coatings is 5 orders of magnitude lower than that of TA1 substrate. In addi tion,the Ale Oa coatings can protect substrate from scouring abrasion effectively.