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    Chromizing over cathodic arc coating
    2.
    发明授权
    Chromizing over cathodic arc coating 有权

    公开(公告)号：US10364490B2

    公开(公告)日：2019-07-30

    申请号：US15103761

    申请日：2014-11-19

    Applicant: United Technologies Corporation

    Inventor： Frank J. Trzcinski ,  Thomas Balzano ,  Prentice M. Sinesi ,  Mark A. Livings ,  Michael N. Task

    IPC: C23C14/58 ,  C23C10/10 ,  C23C10/20 ,  C23C28/02 ,  C23C14/16 ,  C23C10/38 ,  F01D5/28 ,  C23C14/34 ,  C23C30/00 ,  C23C14/14 ,  C23C10/32 ,  B32B15/04

    Abstract: The present invention provides a Cr-rich cathodic arc coating, an article in turbine blade coated with the chromizing over cathodic arc coating, and a method to produce the coating thereof. The Cr-rich cathodic arc coating in the present invention comprises a cathodic arc coating and a diffusion coating deposited atop the cathodic arc coating to enforce hot corrosion resistance. The hardware coated with the chromizing over cathodic arc coating in the present invention is reinforced with superior-hot corrosion resistance. The present invention further provides a novel method for producing the chromizing over cathodic arc coating by re-sequencing coating deposition order. The method in the present invention is efficient and cost-reducing by eliminating some operations, e.g., DHT and peening, between the cathodic arc coating and the diffusion coating. The hot corrosion resistance in the present invention results from the high Cr content in the surface of the coating.

    Metal diffusion and after-treatment
    3.
    发明授权
    Metal diffusion and after-treatment 失效
    金属扩散和后处理

    公开(公告)号：US5194219A

    公开(公告)日：1993-03-16

    申请号：US909723

    申请日：1992-07-07

    Applicant: Alfonso L. Baldi

    Inventor： Alfonso L. Baldi

    IPC: C08J3/09 ,  C23C10/34 ,  C23C10/38 ,  C23C10/48

    CPC classification number: C08J3/091 ,  C23C10/34 ,  C23C10/38 ,  C23C10/48 ,  C08J2333/06 ,  H05K2201/0209

    Abstract: Very good masking of pack diffusion aluminizing or chromizing on any metal to keep portions from being diffusion coated, is effected by localized coating the lowest layer of which is depletion-reducing masking powder the metal portion of which can have same composition as substrates, mixed with inert refractory diluent and non-contaminating film-former such as acrylic resin. The upper coating layer can be of non-contaminating particles like nickel or Cr.sub.2 O.sub.3 that upon aluminizing or chromizing become coherently held together to form a secure sheath. Such sheath can also be used for holding localized diffusion-coating layer in place. Film-former can be dissolved in volatile solvent, preferably methyl chloroform, in which masking powder or sheath-forming powder is suspended. Chromizing can be performed before aluminizing for greater effects. Aluminizing of metals like iron and nickel followed by leaching out much of the diffused-in aluminum, gives these substrates a pyrophoric and catalytic surface. Foil, wire or powder can be thus activated, and very fine activated powder when discharged into the air forms warm cloud that settles very slowly and decoys heat-seeking missiles.

    Abstract translation: 在任何金属上非常好的掩模包覆扩散镀铬或镀铬以保持部分不被扩散涂覆，这是通过局部涂覆来实现的，其中最底层是消耗减少的掩蔽粉末，其金属部分可以具有与底物相同的组成，与 惰性耐火稀释剂和非污染成膜剂如丙烯酸树脂。 上涂层可以是非污染颗粒，如镍或Cr2O3，在镀铝或镀铬时变得相干地保持在一起以形成牢固的护套。 这种护套也可用于将局部扩散涂层保持在适当位置。 成膜剂可以溶解在挥发性溶剂中，优选甲基氯仿，其中悬浮有掩蔽粉末或鞘形成粉末。 在镀铝之前可进行镀铬处理以获得更大的效果。 金属如铁和镍的镀铝，然后浸出大部分扩散的铝，使这些基材成为自燃和催化表面。 箔，线或粉末可以被激活，并且在排入空气中时非常细的活化粉末形成温暖的云层，其沉降非常缓慢并诱发寻热导弹。

    Chromic-phosphoric acid coated aluminized steel
    6.
    发明授权
    Chromic-phosphoric acid coated aluminized steel 失效
    铬磷酸镀铝钢

    公开(公告)号：US3948689A

    公开(公告)日：1976-04-06

    申请号：US404665

    申请日：1973-10-09

    Applicant: Alfonso L. Baldi

    Inventor： Alfonso L. Baldi

    IPC: C23C10/02 ,  C23C10/38 ,  C23C10/60 ,  C23C22/74 ,  B32B15/18

    CPC classification number: C23C10/02 ,  C23C10/38 ,  C23C10/60 ,  C23C22/74 ,  Y02T50/67 ,  Y10S428/938 ,  Y10T428/1259 ,  Y10T428/12757

    Abstract: Low temperature aluminum diffusion is of better quality when effected with a pack energized by aluminum chloride or other material that does not generate nitrogen and is shielded from contacting the work pieces until after the pack is heated to energizing temperatures. The resulting aluminizing very effectively protects steels against corrosion in marine atmospheres, particularly when there is a chromate-type coating applied over the aluminizing. Highly effective chromate-type coating mixture consists essentially of aqueous solution of chromic and phosphoric acid also containing magnesium salts of said acids with or without dispersed polytetrafluoroethylene particles. The salts of divalent metals such as calcium, zinc, strontium, manganese, cobalt and nickel whose chromates are soluble in acid, can be used instead of or in addition to the magnesium. Such coating mixture is best applied over porous pre-coating of colloidal inert particles.

    Abstract translation: 当使用氯化铝或不产生氮气的其他材料通电时，低温铝的扩散质量更好，并且在包装被加热到通电温度之后才被屏蔽以接触工件。 所得到的镀铝非常有效地保护钢在海洋环境中不被腐蚀，特别是当在镀铝层上施加铬酸盐型涂层时。 高效的铬酸盐型涂料混合物基本上由铬酸和磷酸的水溶液组成，还含有具有或不具有分散的聚四氟乙烯颗粒的所述酸的镁盐。 可以使用铬酸盐可溶于酸的二价金属如钙，锌，锶，锰，钴和镍的盐代替镁或除了镁之外。 这种涂料混合物最好用于胶体惰性颗粒的多孔预涂层。

    Formation of diffusion coatings on nickel containing dispersed thoria
    7.
    发明授权
    Formation of diffusion coatings on nickel containing dispersed thoria 失效
    在含有分散THORIA的镍上形成扩散涂层

    公开(公告)号：US3764371A

    公开(公告)日：1973-10-09

    申请号：US3764371D

    申请日：1970-11-18

    Applicant: ALLOY SURFACES CO INC

    Inventor： BALDI A

    IPC: C23C10/38 ,  C23C10/60 ,  C23C9/02

    CPC classification number: C23C10/60 ,  C23C10/38 ,  Y10T428/12861 ,  Y10T428/12944

    Abstract: RICH CHROMIUM DIFFUSION COATING ON TD NICKEL OR TD NICHROME IS OBTAINED IN ONE STEP BY EMBEDDING WORK IN CHROMIUM DIFFUSION COATING PACK CONTAINING NICKEL WITH OR WITHOUT SOME COBALT, AND HELD IN UNSEALED RETORT CUP AT LEAST 15 INCHES HIGH. MAGNESIUM HALIDE IS HELPFUL TO HAVE IN THE PACK AND PACK CAN ALSO CONTAIN METALLIC IRON TO REDUCE COATING TEMPERATURE. MASKING IS ARRANGED BY COVERING THE SITES TO BE MASKED WITH A LAYER OF A MIXTURE OF NICKEL POWDER AND INERT FILLER. FOR BETTER HIGH TEMPERATURE OXIDATION RESISTANCE THE CHROMIUM-RUCH COATING IS COVERED BY AN ALUMINUM DIFFUSION COATING FROM A SIMPLE ALUMINUM DIFFUSION PACK OR ONE THAT HAS THE ALUMINUM MIXED WITH CHROMIUM. LOW TEMPERATURE ALUMINUM DIFFUSION IS MORE UNIFORM WHEN PACK ENERGIZER IS ALUMINUM CHLORIDE OR OTHER MATERIAL THAT DOES NOT GENERATE NITROGEN. A MANGANESE-CONTAINING ALUMINIZING PACK GIVES BETTER PROTECTION THAN A SIMPLE ALUMINIZING PACK, PARTICULARLY AGAINST MARINE CORROSION, AND WHEN THERE IS A CONVERSION COATING APPLIED OVER THE ALUMINIZING. CONVERSION COATING MIXTURE WETS ALUMINIZED FERROUS SURFACE BETTER WHEN THE BLACK IS THEN REMOVED WITH THE HELP OF NITRIC ACID. ALUMINIZED SUPERALLOY CAN BE HEATED IN AIR TO WHITEN IT, THEN CLEANED TO GIVE PRODUCT HAVING MORE ADHERENT CASE. ALSO ADDING SOME LANTHANUM OR YTTRIUM TO SUPERALLOY LIKE WI 52 GIVES BETTER HIGH TEMPERATURE RESISTANCE.

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