公开(公告)号：US3811959A

公开(公告)日：1974-05-21

申请号：US28338072

申请日：1972-08-24

Applicant: CHROMALLOY AMERICAN CORP

Inventor： WEINSTEIN M ,  SPEIRS K ,  BAER R

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

CPC classification number: C23C10/60 ,  C23C22/74

Abstract: AND CURED IN SITU TO FURTHER ENHANCE THE RESISTANCE TO CORROSION.

FERROUS METAL ARTICLES ARE PROVIDED HAVING IMPROVED RESISTANCE TO CORROSION IN HIGHLY SALINE AND/OR MARINE ATMOSPHRES, THE ARTICLES BEING CHARACTERIZED BY A PROTECTIVE DUPLEX COATING COMPRISED OF A SACRIFICAL THERMALLY ALUMINIZED FERROUS METAL SURFACE IN A COMBINATION WITH A SPECIAL BARRIER TYPE NON-METALLIC OVERCOAT. ONE METHOD OF PROVIDING THE FOREGOING SYSTEM IS TO APPLY AN ADHERENT LAYER FROM A LIQUID OF A SOLUBLE SILICATE SALT OR COMPOUND ONTO A THERMALLY ALUMINIZED LAYER, THE SILICATE LYER BEING PREFERABLY THEREAFTER CURED. IN A PREFERRED EMBODIMENT, A CONVERSION COATING IS APPLIED TO THE SILICATE LAYER

公开(公告)号：US3748172A

公开(公告)日：1973-07-24

申请号：US3748172D

申请日：1971-05-17

Applicant: CHROMALLOY AMERICAN CORP

Inventor： BLIZE R ,  SPEIRS K ,  WEINSTEIN M

IPC: C23C10/52 ,  C23C12/02 ,  C23F7/00 ,  C23C9/02 ,  C23F17/00

CPC classification number: C23C10/52 ,  C23C12/02 ,  Y10T428/12792

Abstract: A METHOD IS PROVIDED FOR IMPROVING THE CORROSION RESISTANCE OF MATERIAL SUBSTRATES. THE METHOD IS PARTICULARLY APPLICABLE TO THE PROTECTION OF METAL SUBSTRATES, SUCH AS FERROUS METAL ARTICLES, AMONG OTHER METALS, AND, IN PARTICULAR, TO THE PROTECTION OF LOW ALLOY STEEL GAS TURBINE ENGINE COMPONENTS FOR AIRCRAFT IN WHICH THE SURFACE IS PROVIDED WITH AN ADHERENT PROTECTIVE LAYER OF A SACRIFICAL COATING RICH IN MAGNESIUM AND ALSO CONTAINING SILICON, OXYGEN AND OPTIONALLY IRON. THE COATING IS CHARACTERIZED BY THE PRESENCE OF MAGNESIUM SILICIDE AS A MAJOR ACTIVE CONSTITUENT.

公开(公告)号：US3729295A

公开(公告)日：1973-04-24

申请号：US3729295D

申请日：1971-05-17

Applicant: CHROMALLOY AMERICAN CORP

Inventor： WEINSTEIN M ,  SPEIRS K ,  BAER R

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

CPC classification number: C23C10/60 ,  C23C22/74 ,  Y10S428/933 ,  Y10S428/935 ,  Y10T428/12556 ,  Y10T428/12583 ,  Y10T428/12757 ,  Y10T428/12958 ,  Y10T428/12986

Abstract: FERROUS METAL ARTICLES ARE PROVIDED HAVING IMPROVED RESISTANCE TO CORROSION IN HIGHLY SALINE AND/OR MARINE ATMOSPHERES, THE ARTICLES BEING CHARACTERIZED BY A PROTECTIVE DEPLEX COATING COMPRISED OF A SACRIFICIAL THERMALLY ALUMINIZED FERROUS METAL SURFACE IN A COMBINATION WITH A SPECIAL BARRIER TYPE NON-METALLIC OVERCOAT. ONE METHOD OF PROVIDING THE FOREGOING SYSTEM IS TO APPLY AN ADHERENT LAYER FROM A LIQUID OF A SOLUBLE SLICATE SALT OR COMPOUND ONTO A THERMALLY ALUMINIZED LAYER, THE SILICATE LAYER BEING PREFERABLY THEREAFTER CURED. IN A PEFERRED EMBODIMENT. A CONVERSION COATING IS APPLIED TO THE SILICATE LAYER AND CURED IN SITU TO FURTHER ENHANCE THE RESISTANCE TO CORROSION.

公开(公告)号：US3764373A

公开(公告)日：1973-10-09

申请号：US3764373D

申请日：1972-02-07

Applicant: CHROMALLOY AMERICAN CORP

Inventor： SPEIRS K ,  WEINSTEIN M

IPC: C23C10/02 ,  C23C10/34 ,  C23C10/50 ,  C23C11/00 ,  C23C13/00

CPC classification number: C23C10/50 ,  C23C10/02 ,  C23C10/34

Abstract: AN IMPROVED METHOD FOR DIFFUSION C OATING A METAL, E.G. ALUMINUM, INTO THE SURFACE OF A BASE METAL ARTICLE, E.G. CHROMIUM-CONTAINING STEEL, BY THE PACK CEMENTATION PROCESS IS PROVIDED WHICH ENABLES THE USE OF CEMENTATION TEMPERATURES AS LOW AS 750* TO 775*F. IN ESSENCE THE METHOD COMPRISES, PROVIDING A CEMENTATION PACK COMPRISED OF PARTICULATE COATING METAL (E.G. ALUMINUM), THE CEMENTATION PACK HAVING UNIFORMLY MIXED THEREWITH AN AMOUNT OF A DRY CLEANSING AND TRANSPORT-INDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF METAL HALIDES AND IODINE (SUCH AS ALCL3) EFFECTIVE TO PROMOTE THE DEPOSITION OF SAID COATING METAL AT AN ELEVATED METAL COATING AND DIFFUSION TEMPERATURE, THE CLEANSING AND TRANSPORT-INDUCING AGENT BEING CHARACTERIZED BY SUBSTANTIAL VAPOR PRESSURE WHEN HEATED TO ABOVE AMBIENT TEMPERATURE AND BELOW THE METAL COATING AND DIFFUSION TEMPERATURE. THE BASE METAL ARTICLE IS COMPLETELY EMBEDDED INTO THE CEMENTATION PACK CONFINED IN A CLOSED RETORT AND THE PACK WITH THE EMBEDDED ARTICLE THEN SUBJECTED TO A HEATING CYCLE BY HEATING THE PACK TO A METAL COATING AND DIFFUSION TEMPERATURE AT A RATE CHARACTERIZED BY AN ENDOTHERMIC ARREST AT A TEMPERATURE BELOW SAID METAL COATING AND DIFFUSION TEMPERATURE, WHEREBY SUBSTANTIAL OUTGASSING OCCURS DURING SSAID ENDOTHERMIC ARREST, AND THE HEATING TO AND AT THE METAL COATING AND DIFFUSION TEMPERATURE BEING THEN CONTINUED UNTIL THE DESIRED COATING THICKNESS HAS BEEN OBTAINED.

公开(公告)号：US3762885A

公开(公告)日：1973-10-02

申请号：US3762885D

申请日：1972-02-07

Applicant: CHROMALLOY AMERICAN CORP

Inventor： SPEIRS K ,  WEINSTEIN M

IPC: C21D7/06 ,  C23C10/02 ,  B23P3/12

CPC classification number: C23C10/02 ,  C21D7/06 ,  Y02T50/67 ,  Y10S428/938 ,  Y10T428/12465 ,  Y10T428/12757

Abstract: An article of manufacture is provided comprising a thermally aluminum-coated structural element of chromium-containing steel having a substantially uniform diffused layer of aluminum on the substrate thereof, said substrate being characterized by compressive stresses introduced by shot peening before applying the coating, the compressive stresses at the substrate together with the overlying diffused layer of aluminum providing improved resistance to fatigue coupled with improved resistance to corrosion and oxidation.