CN1155729C - Novel corrosion resistant titanium alloy - Google Patents
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- 239000000203 mixture Substances 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 32
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 32
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 21
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Abstract
一种新型耐蚀钛合金。本发明的成分(按%重量计)为：Ni＝0.3-3，Cr＝0.3-3，Mo＝0.3-3，Cu＝0.3-3及平衡量的Ti，且合金可用熔铸压力加工方法或粉末冶金方法制造。本发明由于采用少量多元合金化的方法，在合金中加入适量的Ni、Cr、Mo、Cu元素，大大提高了合金的机械强度和在各种介质中的耐蚀性、扩大了适用介质范围，此外合金加工性能良好，不含稀贵金属，制造成本低，具有市场竞争力和推广使用价值。A new corrosion-resistant titanium alloy. The composition of the present invention (by % weight) is: Ni=0.3-3, Cr=0.3-3, Mo=0.3-3, Cu=0.3-3 and Ti in balance, and the alloy can be processed by melting and casting pressure or powder Manufactured by metallurgical methods. Due to the adoption of a small amount of multi-element alloying method, the present invention adds an appropriate amount of Ni, Cr, Mo, and Cu elements into the alloy, which greatly improves the mechanical strength of the alloy and the corrosion resistance in various media, and expands the range of applicable media. In addition, the alloy has good processing performance, does not contain rare and precious metals, has low manufacturing cost, and has market competitiveness and popularization and use value.
Description
本发明涉及一种耐蚀钛合金。The invention relates to a corrosion-resistant titanium alloy.
钛金属在氧化性、中性或弱还原性介质中，由于表面形成保护性钝化膜，具有很强的耐蚀性，但在还原性酸溶液或强氧化性介质中，由于表面难以形成完整的保护性钝化膜，耐蚀性便不够理想，在高温氯化物溶液中还会产生缝隙腐蚀。为了进一步提高钛金属的耐蚀性，可以通过合金化方法，例如，加入能直接促进钝化的元素或间接促进钝化的所谓阴极含金化元素。70年代中期美国研制出Ti-0.3Mo-0.8Ni合金，已获得广泛应用。《稀有金属材料与工程》第21卷1期《耐蚀Ti-0.3Mo-0.8Ni合金的研制》一文详细介绍了这种合金，它在较低浓度的盐酸、硫酸等还原性酸中具有较好的耐蚀性，对高温氯化物溶液具有较强的抗缝隙腐蚀能力，且加工性能好，但这种合金由于合金元素浓度低，适用的介质范围比较窄，机械强度与纯钛相比没有显著提高。Titanium metal has strong corrosion resistance due to the formation of a protective passivation film on the surface in oxidizing, neutral or weakly reducing media, but in reducing acid solutions or strong oxidizing media, it is difficult to form a complete If there is a protective passivation film, the corrosion resistance is not ideal, and crevice corrosion will occur in high temperature chloride solution. In order to further improve the corrosion resistance of titanium metal, alloying methods can be used, for example, adding elements that can directly promote passivation or indirectly promote passivation The so-called cathode gold-containing elements. In the mid-1970s, the United States developed Ti-0.3Mo-0.8Ni alloy, which has been widely used. The article "Development of Corrosion-resistant Ti-0.3Mo-0.8Ni Alloy" in Volume 21, Issue 1 of "Rare Metal Materials and Engineering" introduces this alloy in detail. Good corrosion resistance, strong crevice corrosion resistance to high temperature chloride solution, and good processing performance, but due to the low concentration of alloying elements, the applicable medium range of this alloy is relatively narrow, and its mechanical strength is not as good as that of pure titanium. Significantly increased.
本发明的目的是提供一种具有中高强度，适用介质范围广泛的耐蚀钛合金。The object of the present invention is to provide a corrosion-resistant titanium alloy with medium and high strength and a wide range of applicable media.
本发明的技术解决方案是：本耐蚀钛合金的成分(按％重量计)为Ni＝0.3-3，Cr＝0.3-3，Mo＝0.3-3，Cu＝0.3-3及平衡量的Ti。The technical solution of the present invention is: the composition (by % weight) of this corrosion-resistant titanium alloy is Ni=0.3-3, Cr=0.3-3, Mo=0.3-3, Cu=0.3-3 and the Ti of balance .
本发明为使合金具有中高强度和在更广的介质范围具有优良的耐蚀性，其要点是采用少量多元合金化的方法，在合金中加入多种少量强化元素，通过固溶强化和析出强化使合金获得较高的机械强度，Ni、Cr、Mo、Cu均为β稳定元素，合金在常温下为α+β组织，其中Mo为同晶型β稳定元素，能全部固溶于β-Ti中，Ni、Cr、Cu为共析型β稳定元素，会产生共析转变，而其中Ni、Cu共析转变速度快，可通过热处理对Ti基体起析出强化作用。同时Ni、Cr、Mo、Cu都具有促进钝化作用，以不同方式对合金耐蚀性的提高作出贡献，其中Cr使合金阳极极化曲线上的致钝电位(Ecp)负移，即促使Ti提早钝化，Cr和Mo都使维钝电位(Ep)负移，使Ti合金容易实现稳定钝态，并降低钝态腐蚀电流(ip)，从而提高合金的耐蚀性。Cu作为阴极合金化元素作用虽不如Pd、Pt、Ru、Re等稀贵金属，但也具有间接促进阳极钝化的作用。Ni在α-Ti中的固溶度极小(在共析温度下＜0.2％)通过适当热处理析出Ti2Ni相，Ti2Ni具有低的析氢过电位，在微电池中作为有效的活性阴极存在，加速阴极的析氢反应，把腐蚀电位提高到α-Ti钝化区，促进阳极钝化。In order to make the alloy have medium and high strength and have excellent corrosion resistance in a wider range of media, the main point of the present invention is to use a small amount of multi-element alloying method, add a variety of small amounts of strengthening elements to the alloy, and through solid solution strengthening and precipitation strengthening Make the alloy obtain higher mechanical strength. Ni, Cr, Mo, and Cu are all β-stable elements. The alloy has an α+β structure at room temperature, and Mo is an isomorphic β-stable element, which can be completely dissolved in β-Ti Among them, Ni, Cr, and Cu are eutectoid β-stable elements, which will produce eutectoid transformation, and the eutectoid transformation speed of Ni and Cu is fast, which can strengthen the precipitation of Ti matrix by heat treatment. At the same time, Ni, Cr, Mo, and Cu all have the effect of promoting passivation, and contribute to the improvement of the corrosion resistance of the alloy in different ways. Among them, Cr makes the passivation potential (Ecp) on the anodic polarization curve of the alloy shift negatively, that is, promotes Ti Early passivation, both Cr and Mo will negatively shift the passivation potential (Ep), making it easy for the Ti alloy to achieve a stable passivation state, and reduce the passivation corrosion current (ip), thereby improving the corrosion resistance of the alloy. Cu as a cathode alloying element is not as effective as Pd, Pt, Ru, Re and other rare and precious metals, but it also has the effect of indirectly promoting anode passivation. The solid solubility of Ni in α-Ti is extremely small (<0.2% at the eutectoid temperature) and the Ti 2 Ni phase is precipitated by proper heat treatment. Ti 2 Ni has a low hydrogen evolution overpotential and is used as an effective active cathode in a micro-battery Existence, accelerate the hydrogen evolution reaction of the cathode, increase the corrosion potential to the α-Ti passivation area, and promote the anode passivation.
本发明综合考虑了提高机械强度和耐蚀性的要求，选取合金的成分在合适范围内，如合金浓度低于下限，强化和改善耐蚀性的作用不足，浓度高于上限，合金的塑性、韧性降低，加工困难；对于耐蚀性来说，浓度没必要太高，且由于过钝化，破裂电位降低，维钝范围变窄，对耐蚀性不利。考虑其综合性能，一般来说上述合金成分(按％重量计)的较佳值为Ni＝1-2，Cr＝0.5-2，Mo＝0.5-2，Cu＝0.5-2.5及平衡量的Ti。4种元素的总量在2.5-5.5％重量范围内为佳。The present invention comprehensively considers the requirements for improving mechanical strength and corrosion resistance, and selects the composition of the alloy within a suitable range. If the concentration of the alloy is lower than the lower limit, the effect of strengthening and improving corrosion resistance is insufficient, and the concentration is higher than the upper limit. The toughness is reduced and the processing is difficult; for corrosion resistance, the concentration is not necessary to be too high, and due to overpassivation, the rupture potential is reduced and the range of dimensional passivation is narrowed, which is not good for corrosion resistance. Considering its overall performance, generally speaking, the preferred values of the above-mentioned alloy composition (by weight %) are Ni=1-2, Cr=0.5-2, Mo=0.5-2, Cu=0.5-2.5 and the balance amount of Ti . The total amount of the four elements is preferably in the range of 2.5-5.5% by weight.
上述钛合金可用熔铸压力加工方法制造。The above-mentioned titanium alloy can be produced by casting and pressure processing.
上述钛合金也可用粉末冶金方法制造。The above-mentioned titanium alloys can also be produced by powder metallurgy.
本发明由于采用少量多元合金化的方法，在合金中加入适量的Ni、Cr、Mo、Cu元素，大大提高了合金的机械强度，和在各种介质中的耐蚀性以及扩大了适用的介质范围，同时大大增强了抗缝隙腐蚀的能力。此外合金加工性能良好不含稀贵金属，制造成本低，具有较强的市场竞争力和推广使用价值。Due to the adoption of a small amount of multi-component alloying method, the present invention adds an appropriate amount of Ni, Cr, Mo, and Cu elements to the alloy, which greatly improves the mechanical strength of the alloy, the corrosion resistance in various media, and expands the applicable media. range, while greatly enhancing the ability to resist crevice corrosion. In addition, the alloy has good processing performance, does not contain rare and precious metals, has low manufacturing cost, and has strong market competitiveness and promotion and use value.
以下根据实施例详细说明本发明合金的制备及性能测试结果：The preparation and performance test results of the alloy of the present invention are described in detail below according to the examples:
实施例1：本例采用熔铸方法制造合金，具体用海绵钛、电解镍片、铬粒、紫铜车屑及50Ti-50Mo中间合金按Ti-1Ni-0.5Cr-0.5Mo-0.5Cu比例称重，混合压成电极，经二次真空自耗电弧熔炼，得到Φ90mm锭，剥皮去冒口得85mm圆坯，再经1050℃～1100℃加热锻成50mm方坯，再经1000℃加热锻成Φ20-30mm圆棒。取样测试其性能得到如下结果：密度4.58g/cm3，硬度Hv195，抗拉强度σb666Mpa，延伸率δ16％，断面收缩率 37％，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.025和0.042mm/年。Embodiment 1: This example adopts melting and casting method to manufacture alloy, concretely use titanium sponge, electrolytic nickel sheet, chromium grain, red copper turnings and 50Ti-50Mo intermediate alloy to weigh according to the ratio of Ti-1Ni-0.5Cr-0.5Mo-0.5Cu, Mixed and pressed into electrodes, after secondary vacuum consumable arc melting, a Φ90mm ingot was obtained, peeled and removed to obtain a 85mm round billet, and then heated at 1050°C to 1100°C to form a 50mm square billet, and then heated at 1000°C to obtain a Φ20mm round billet. -30mm round bar. Sampling and testing its performance obtained the following results: density 4.58g/cm 3 , hardness Hv195, tensile strength σb666Mpa, elongation δ16%, reduction of area 37%, and the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid at room temperature are 0.025 and 0.042mm/year respectively.
实施例2：本例采用熔铸方法制造合金，具体用海绵钛、电解镍片、铬粒、紫铜车屑及50Ti-50Mo中间合金按Ti-2Ni-1Cr-0.8Mo-0.5Cu比例称重，混合压成电极，同实施例1一样的方法制成棒材，取样测试其性能，得到如下结果：密度4.62g/cm3，硬度Hv260，抗拉强度σb852Mpa，延伸率δ10％，断面收缩率 17％，常温下在15％盐酸和20％硫酸中所腐蚀率分别为0.0071和0.011mm/年。本例合金中四种元素含量为最佳配方，它在各种条件的介质中的耐蚀性与工业纯钛及Ti-0.8Ni-0.3Mo合金的对照如表一所示。Embodiment 2: This example adopts melting and casting method to manufacture alloy, concretely use sponge titanium, electrolytic nickel sheet, chromium particle, red copper turnings and 50Ti-50Mo intermediate alloy to weigh according to the proportion of Ti-2Ni-1Cr-0.8Mo-0.5Cu, mix Press into electrodes, make rods with the same method as in Example 1, take samples to test its properties, and obtain the following results: density 4.62g/cm 3 , hardness Hv260, tensile strength σb852Mpa, elongation δ10%, reduction of area 17%, the corrosion rates in 15% hydrochloric acid and 20% sulfuric acid at room temperature are 0.0071 and 0.011mm/year respectively. The content of the four elements in the alloy in this example is the best formula, and its corrosion resistance in various media conditions is compared with industrial pure titanium and Ti-0.8Ni-0.3Mo alloy as shown in Table 1.
实施例3：本例采用粉末冶金方法制造合金，具体以-200目钛粉、镍粉、铬粉、钼粉、铜粉按Ti-0.3Ni-3Cr-2Mo-0.3Cu比例称重，球磨混合，装塑料膜套，以220MPa压力冷等静压成形，经1150℃/2h真空烧结获得棒料，取样测试其性能，得到以下结果：密度4.53g/cm3，硬度Hv422，抗拉强度σb1050MPa，延伸率δ2％，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.13和0.27mm/年。Example 3: In this example, the powder metallurgy method is used to manufacture the alloy. Specifically, -200 mesh titanium powder, nickel powder, chromium powder, molybdenum powder, and copper powder are weighed according to the ratio of Ti-0.3Ni-3Cr-2Mo-0.3Cu, and mixed by ball milling , fitted with a plastic film sleeve, formed by cold isostatic pressing at 220MPa pressure, obtained bar material by vacuum sintering at 1150℃/2h, sampling and testing its properties, and obtained the following results: density 4.53g/cm 3 , hardness Hv422, tensile strength σb1050MPa, The elongation rate is δ2%, and the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid are 0.13 and 0.27mm/year respectively at room temperature.
实施例4：本例采用粉末冶金方法制造合金，具体以-200目钛粉、镍粉、铬粉、钼粉、铜粉按Ti-1Ni-2Cr-3Mo-1Cu比例称重，球磨混合，装塑料模套以220MPa压力冷等静压成形，经1200℃/2h真空烧结获得棒料，取样测试其性能得以下结果：密度4.79g/cm3，硬度Hv487，抗拉强度σb1070Mpa，延伸δ1.5％，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.021和0.025mm/年。Embodiment 4: In this example, the powder metallurgy method is used to manufacture the alloy. Specifically, -200 mesh titanium powder, nickel powder, chromium powder, molybdenum powder, and copper powder are weighed according to the ratio of Ti-1Ni-2Cr-3Mo-1Cu, mixed by ball milling, and loaded The plastic mold cover is formed by cold isostatic pressing at 220MPa pressure, and the bar is obtained by vacuum sintering at 1200℃/2h. The following results are obtained by sampling and testing its properties: density 4.79g/cm 3 , hardness Hv487, tensile strength σb1070Mpa, elongation δ1.5 %, the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid at normal temperature are 0.021 and 0.025mm/year respectively.
实施例5：本例采用粉末冶金方法制造合金，具体以-200目氢化钛粉、镍粉、铬粉、钼粉、铜粉按Ti-1.5Ni-0.3Cr-1.5Mo-2Cu比例称重，球磨混合，装塑料模套以220MPa压力冷等静压成形，经1100℃/2h真空烧结获得棒料，取样测试其性能得以下结果：密度4.60g/cm3，硬度Hv450，抗拉强度σb1180Mpa，延伸δ1.0％，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.017和0.012mm/年。Embodiment 5: In this example, the powder metallurgy method is used to manufacture the alloy. Specifically, -200 mesh titanium hydride powder, nickel powder, chromium powder, molybdenum powder, and copper powder are weighed according to the proportion of Ti-1.5Ni-0.3Cr-1.5Mo-2Cu, Mixed by ball milling, fitted with a plastic mold cover and formed by cold isostatic pressing at a pressure of 220MPa, the bar was obtained by vacuum sintering at 1100°C/2h, and the properties were sampled and tested to obtain the following results: density 4.60g/cm 3 , hardness Hv450, tensile strength σb1180Mpa, The extension δ is 1.0%, and the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid are respectively 0.017 and 0.012mm/year at room temperature.
实施例6：本例采用粉末冶金方法制造合金，具体以-200目氢化钛粉、镍粉、铬粉、钼粉、铜粉按Ti-3Ni-0.8Cr-0.3Mo-3Cu比例称重，球磨混合，装塑料模套以220MPa压力冷等静压成形，经1050℃/2h真空烧结获得棒料，取样测试其性能得以下结果：密度4.56g/cm3，硬度Hv515，抗拉强度σb1220Mpa，延伸δ为0，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.015和0.010mm/年。Embodiment 6: In this example, the powder metallurgy method is used to manufacture the alloy. Specifically, -200 mesh titanium hydride powder, nickel powder, chromium powder, molybdenum powder, and copper powder are weighed according to the proportion of Ti-3Ni-0.8Cr-0.3Mo-3Cu, and ball milled Mix and install the plastic mold cover and form it by cold isostatic pressing at 220MPa pressure. After vacuum sintering at 1050℃/2h to obtain the rod, the performance of the sample test is as follows: density 4.56g/cm 3 , hardness Hv515, tensile strength σb1220Mpa, elongation δ is 0, and the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid are 0.015 and 0.010mm/year respectively at room temperature.
实施例7：本例采用粉末冶金方法制造合金，具体以-200目氢化钛粉、镍粉、铬粉、钼粉、铜粉按Ti-2Ni-1Cr-0.8Mo-0.5Cu比例称重，球磨混合，装塑料模套以220MPa压力冷等静压成形，经1050℃/2h真空烧结获得棒料，取样测试其性能得以下结果：密度4.56g/cm3，硬度Hv430，抗拉强度σb1290Mpa，延伸δ3.8％，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.008和0.013mm/年。Example 7: In this example, the powder metallurgy method is used to manufacture alloys. Specifically, -200 mesh titanium hydride powder, nickel powder, chromium powder, molybdenum powder, and copper powder are weighed according to the ratio of Ti-2Ni-1Cr-0.8Mo-0.5Cu, and ball milled Mix and install the plastic mold cover and form it by cold isostatic pressing at 220MPa pressure. After vacuum sintering at 1050°C/2h to obtain the rod, the performance of the sample test is as follows: density 4.56g/cm 3 , hardness Hv430, tensile strength σb1290Mpa, elongation δ3.8%, the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid are 0.008 and 0.013mm/year respectively at room temperature.
实施例8：本例采用粉末冶金方法制造合金，具体以-200目氢化钛粉、镍粉、铬粉、钼粉、铜粉按Ti-0.8Ni-0.5Cr-1Mo-0.3Cu比例称重，球磨混合，装塑料模套以220MPa压力冷等静压成形，经1200℃/2h真空烧结获得棒料，取样测试其性能得以下结果：密度4.48g/m3，硬度Hv310，抗拉强度σb780Mpa，延伸δ4.2％，常温下在15％盐酸和20％硫酸中年腐蚀率分别为0.16和0.11mm/年。Embodiment 8: In this example, the powder metallurgy method is used to manufacture the alloy. Specifically, -200 mesh titanium hydride powder, nickel powder, chromium powder, molybdenum powder, and copper powder are weighed according to the ratio of Ti-0.8Ni-0.5Cr-1Mo-0.3Cu, Mixed by ball milling, fitted with a plastic mold cover and formed by cold isostatic pressing at a pressure of 220MPa, the bar was obtained by vacuum sintering at 1200°C/2h, and the properties were sampled and tested to obtain the following results: density 4.48g/m 3 , hardness Hv310, tensile strength σb780Mpa, The extension δ is 4.2%, and the annual corrosion rates in 15% hydrochloric acid and 20% sulfuric acid are 0.16 and 0.11mm/year respectively at room temperature.
综合以上实施例可知，本发明所述耐蚀钛合金与工业纯钛和Ti-0.8Ni-0.3Mo合金相比具有如下优点：Based on the above examples, it can be seen that the corrosion-resistant titanium alloy of the present invention has the following advantages compared with industrial pure titanium and Ti-0.8Ni-0.3Mo alloy:
机械强度方面：工业纯钛的抗拉强度σb为390-540Mpa，Ti-0.8Ni-0.3Mo合金σb为490-550Mpa，而本发明合金σb达666-1290Mpa，明显高于工业纯钛和Ti-0.8Ni-0.3Mo合金，具有中高强度水平。In terms of mechanical strength: the tensile strength σb of industrial pure titanium is 390-540Mpa, the Ti-0.8Ni-0.3Mo alloy σb is 490-550Mpa, and the alloy σb of the present invention reaches 666-1290Mpa, significantly higher than industrial pure titanium and Ti- 0.8Ni-0.3Mo alloy with medium to high strength levels.
耐蚀性方面：选取本发明中最有代表性的实施例2Ti-2Ni-1Cr-0.8Mo-0.5Cu合金与工业纯钛在各种介质中进行腐蚀试验的结果并与文献中Ti-0.8Ni-0.3Mo合金和Ti-0.5Pd合金有关试验数据进行比较(见表一)，可知本发明钛合金不但在氧化性强的腐蚀介质如硝酸等溶液中具有优异的耐腐蚀性能，在还原性强腐蚀介质如盐酸等溶液中也有相当好的耐腐蚀性，而且本发明耐腐蚀的介质范围也大大扩展了。常温下在盐酸、硫酸中能耐蚀的浓度范围工业纯钛不超过4％，Ti-0.8Ni-0.3Mo合金不超过10％，本发明合金分别可达15％和20％。同时本发明所述钛合金由于加入了适量Ni、Mo元素，增强了抗缝隙腐蚀的能力。此外本发明合金加工性能良好，不含稀贵金属，制造成本低，具有较强的竞争力和推广使用价值，可广泛应用于氯碱、制盐、冶金、化肥、化纤、造纸、电力、电镀、医药、食品、环保等部门，特别适合于纯钛和Ti-0.8Ni-0.3Mo钛合金不适应的腐蚀条件苛刻且要求中高强度的情况下应用。Aspects of corrosion resistance: choose the most representative embodiment 2Ti-2Ni-1Cr-0.8Mo-0.5Cu alloy among the present invention and industrial pure titanium to carry out the result of corrosion test in various media and compare with the Ti-0.8Ni in the literature -0.3Mo alloy and Ti-0.5Pd alloy relevant test data are compared (see Table 1), as can be seen that titanium alloy of the present invention not only has excellent corrosion resistance in oxidizing strong corrosive media such as nitric acid etc. Corrosive media such as hydrochloric acid and other solutions also have quite good corrosion resistance, and the range of corrosion-resistant media of the present invention has also been greatly expanded. The concentration range of corrosion resistance in hydrochloric acid and sulfuric acid at normal temperature is no more than 4% for industrial pure titanium, no more than 10% for Ti-0.8Ni-0.3Mo alloy, and 15% and 20% for the alloy of the present invention respectively. At the same time, the titanium alloy of the invention has enhanced crevice corrosion resistance due to the addition of appropriate amounts of Ni and Mo elements. In addition, the alloy of the present invention has good processing performance, does not contain rare and precious metals, has low manufacturing cost, has strong competitiveness and popularization and use value, and can be widely used in chlor-alkali, salt production, metallurgy, chemical fertilizer, chemical fiber, papermaking, electric power, electroplating, medicine , food, environmental protection and other departments, especially suitable for applications where pure titanium and Ti-0.8Ni-0.3Mo titanium alloys are not suitable for harsh corrosion conditions and require medium and high strength.
表一：Table I:
本发明合金Ti-2Ni-1Cr-0.8Mo-0.5Cu和工业纯钛及Ti-0.8Ni-0.3Mo合金在各种介质中的耐蚀性能对照表
*为引用《稀有金属材料与工程》第21卷1期《耐蚀Ti-0.3Mo-0.8Ni合金的研制》文中数据 * In order to quote the data in the article "Development of Corrosion-resistant Ti-0.3Mo-0.8Ni Alloy", Volume 21, Issue 1 of "Rare Metal Materials and Engineering"
**为Ti-0.15Pd合金腐蚀试验数据 ** is the corrosion test data of Ti-0.15Pd alloy
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