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公开(公告)号：USRE29212E
公开(公告)日：1977-05-10
申请号：US662517
申请日：1976-03-01
摘要： In the diffusion coating of aluminum onto brazed metal, the penetration of the aluminum into the brazing is reduced by conducting the diffusion coating with hydrated aluminum chloride, bromide or iodide as energizer, with the energizer preferably kept out of contact with the work being coated until the energizer volatilizes. This is particularly suited for aluminizing chromium-containing surfaces. Chromium diffusion coatings are less apt to form undesirable oxide inclusions when the diffusion coating is from a pack containing at least about 3% Ni.sub.3 Al. Also the formation of undesirable alpha-chromium is reduced when the pack diffusion is carried out with a retort effectively not over 5 inches in height. Pack aluminizing where the aluminizing is inhibited by the presence of chromium in the pack makes a very effective top coating over platinum plated or platinum coated nickel-base superalloys. Aluminized nickel can also have its aluminum attacked and at least partially removed with aqueous caustic to leave a very highly active catalytic surface. Pack diffusion can also be arranged to simultaneously provide different coatings in different locations by using different pack compositions in those locations. An aluminizing pack containing a large amount of chromium provides a thinner aluminized case than an aluminizing pack containing less chromium and some silicon. Also a cobalt-chromium pack deposits essentially a chromized case when energized with a chloride, but deposits large amounts of cobalt along with chromium when energized with an iodide.
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公开(公告)号：US4154705A
公开(公告)日：1979-05-15
申请号：US755738
申请日：1976-12-30
IPC分类号： B01D53/86 , B01J23/40 , B01J23/755 , B01J35/04 , B01J37/06 , C23C10/02 , C23C10/40 , C23C10/48 , C23C10/56 , C23C10/60 , B01J21/04 , B01J23/42 , B01J23/60 , B01J23/74
CPC分类号： B01J35/04 , B01D53/86 , B01J23/40 , B01J23/755 , B01J37/06 , C23C10/02 , C23C10/40 , C23C10/48 , C23C10/56 , C23C10/60
摘要： Foil, wire and similar coherent bodies of catalytic metal are provided with catalytically active surfaces by diffusing a chemically removable metal such as aluminum or zinc into those surfaces and then selectively dissolving out at least about a third of the removable metal. Platinum wire screens activated in this way make effective exhaust catalysts for automotive engines.
摘要翻译： 通过将诸如铝或锌的化学上可移除的金属扩散到这些表面中，然后选择性地溶解至少约三分之一的可移除金属，从而提供催化金属的箔，线和类似的连贯体的催化活性表面。 以这种方式激活的铂金丝网为汽车发动机生产有效的排气催化剂。
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公开(公告)号：US4041196A
公开(公告)日：1977-08-09
申请号：US576981
申请日：1975-05-13
CPC分类号： B01J35/04 , C23C10/40 , C23C10/42 , C23C10/58 , C23C10/60 , Y10T428/12778 , Y10T428/12854
摘要： In the pack diffusion coating of chromium into the surface of a superalloy, the formation of undesirable oxide inclusion is reduced when the diffusion coating pack contains at least about 3% Ni.sub.3 Al. Also the formation of alpha-chromium is reduced when the pack diffusion is carried out in a retort effectively not over five inches in height. Pack aluminizing in the presence of chromium makes a very effective aluminum- and chromium-containing top coating over platinum plated or platinum coated nickel-base superalloys. Aluminized nickel can also have its aluminum attacked and at least partially removed with aqueous caustic to leave a very highly active catalytic surface. Pack diffusion can also be arranged to simultaneously provide different coatings in different locations by using different pack compositions in those locations. An aluminizing pack containing a large amount of chromium provides a thinner aluminized case than an aluminizing pack containing less chromium, or less chromium and some silicon. A cobalt-chromium pack deposits essentially a chromized case when energized with a chloride, but deposits large amounts of cobalt along with chromium when energized with an iodide. Even more chromium with large amounts of cobalt are deposited when the energizer is a mixture of iodide and chloride. Depletion of diffusible material from workpieces heated in a powder-pack can also be readily controlled by adjusting the pack composition, and such depletion from cobalt-base superalloys very simply provides a surface on which aluminizing produces a highly impact-resistant coating.
摘要翻译： 在将包含在超级合金表面中的铬扩散涂层中，当扩散涂层包含至少约3％Ni 3 Al时，形成不期望的氧化物夹杂物减少。 当包装扩散在有效地不超过五英寸高的蒸馏器中进行时，还可以减少α-铬的形成。 在镀铬的情况下，镀铝处理使镀铂或镀铂镍基超级合金上的铝和铬的顶涂层非常有效。 镀铝的镍还可以使铝侵蚀，并用苛性碱水溶液至少部分去除以留下非常高活性的催化剂表面。 包装扩散还可以被布置成通过在那些位置使用不同的包装组合来在不同位置同时提供不同的涂层。 含有大量铬的镀铝包装提供比含有较少铬或更少的铬和一些硅的镀铝包装的更薄的镀铝箱。 当用氯化物通电时，钴 - 铬组合物基本上沉积有铬化的壳体，但是当用碘化物通电时，它们与铬一起沉积大量的钴。 当激发剂是碘化物和氯化物的混合物时，沉积更多的具有大量钴的铬。 通过调整包装组合物也可以容易地控制从粉末包装中加热的工件中消散可扩散材料，并且这种由钴基超级合金的这种消耗非常简单地提供了在其上镀铝产生高抗冲击性涂层的表面。
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公开(公告)号：US4528215A
公开(公告)日：1985-07-09
申请号：US548937
申请日：1983-11-07
IPC分类号： B01J35/04 , C23C10/02 , C23C10/40 , C23C10/48 , C23C10/56 , C23C10/58 , C23C10/60 , C23C11/00 , C23C13/00
摘要： In the pack diffusion coating of chromium into the surface of a superalloy, the formation of undesirable oxide inclusion is reduced when the diffusion coating pack contains at least about 3% Ni.sub.3 Al. Also the formation of alpha-chromium is reduced when the pack diffusion is carried out in a retort effectively not over five inches in height. On the other hand an alpha-chromium-rich layer at least 0.2 mil thick can be deliberately formed and the superalloy thus coated subjected to an aluminizing treatment to convert the alpha-chromium into islands that provide very high sulfidation resistance. Pack aluminizing in the presence of chromium makes a very effective aluminum- or chromium-containing top coating over platinum plated or platinum coated nickel-base superalloys. Depletion of diffusible material from workpieces heated in a powder-pack can also provide a surface on which aluminizing produces a highly impact-resistant coating.
摘要翻译： 在将包含在超级合金表面中的铬扩散涂层中，当扩散涂层包含至少约3％Ni 3 Al时，形成不期望的氧化物夹杂物减少。 当包装扩散在有效地不超过五英寸高的蒸馏器中进行时，还可以减少α-铬的形成。 另一方面，可以有意地形成至少0.2密耳厚的富铬的层，并且如此涂覆的超级合金进行镀铝处理以将α-铬转化为提供非常高的耐硫化性的岛。 在镀铬的情况下，镀铝处理使镀铂或镀铂镍基超级合金上的铝或铬的顶涂层非常有效。 从粉末包装中加热的工件中消散可扩散材料还可以提供一种表面，在该表面上，铝化产生高度耐冲击的涂层。
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公开(公告)号：USRE31104E
公开(公告)日：1982-12-14
申请号：US234315
申请日：1981-02-13
IPC分类号： B01J23/60 , B01J35/04 , B01J35/06 , C23C10/02 , C23C10/36 , C23C10/40 , C23C10/48 , C23C10/56 , C23C10/58 , C23C10/60
CPC分类号： B01J35/06 , B01J23/60 , B01J35/04 , C23C10/02 , C23C10/36 , C23C10/40 , C23C10/48 , C23C10/56 , C23C10/58 , C23C10/60
摘要： Foil, wire and similar coherent bodies of catalytic metal are provided with catalytically active surfaces by diffusing a chemically removable metal such as aluminum or zinc into those surfaces and then selectively dissolving out at least about a third of the removable metal. Platinum wire screens activated in this way make effective exhaust catalysts for automotive engines.
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公开(公告)号：US4292208A
公开(公告)日：1981-09-29
申请号：US687
申请日：1979-01-03
IPC分类号： B01J25/00 , B01J35/04 , B01J37/06 , C23C10/40 , C23C10/42 , C23C10/50 , C23C10/56 , C23C10/58 , C23C10/60 , B01J23/16 , B01J23/74 , B32B15/14
CPC分类号： B01J35/04 , B01J25/00 , B01J37/06 , C23C10/40 , C23C10/42 , C23C10/50 , C23C10/56 , C23C10/58 , C23C10/60 , Y10T428/12424 , Y10T428/12438 , Y10T428/12479 , Y10T428/12944 , Y10T428/12958 , Y10T428/12979
摘要： Diffusion coating a substrate metal with a different metal, such as aluminum and zinc, that is then chemically removed from the coated substrate, provides the residual metal with a very desirable catalytic surface. At least about a third of the removable metal can be dissolved out. Platinum wire screens activated in this way make effective exhaust catalysts for automotive engines. Chromium-rich coating for protective purposes can be applied on a superalloy, diffusion coating in a pack that in addition to the chromium to be diffused, also contains at least about 3% Ni.sub.3 Al. Also the formation of alpha-chromium is reduced when the pack diffusion is carried out in a retort effectively not over five inches in height. Pack aluminizing in the presence of chromium makes a very effective aluminum- and chromium-containing top coating over platinum plated or platinum coated nickel-base superalloys. Depletion of diffusible material from workpieces heated in a powder-pack can also provide a surface on which aluminizing produces a highly impact-resistant coating.
摘要翻译： 使用不同金属（例如铝和锌）的基底金属的扩散涂覆，然后从涂覆的基底中化学去除，为残留金属提供了非常理想的催化剂表面。 至少约三分之一的可移除金属可以溶出来。 以这种方式激活的铂金丝网为汽车发动机生产有效的排气催化剂。 用于保护目的的富铬涂层可以应用于超合金，包装中的扩散涂层，除了要扩散的铬外，还含有至少约3％的Ni3Al。 当包装扩散在有效地不超过五英寸高的蒸馏器中进行时，还可以减少α-铬的形成。 在镀铬的情况下，镀铝处理使镀铂或镀铂镍基超级合金上的铝和铬的顶涂层非常有效。 从粉末包装中加热的工件中消散可扩散材料还可以提供一种表面，在该表面上，铝化产生高度耐冲击的涂层。
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