SK45093A3 - Surface finishes and methods for the production thereof - Google Patents

Abstract

Thin impermeable, surface hardened, corrosion-resistant, durable, dry lubricant surface finishes are provided as well as surface finished products and methods for the production thereof. The surface finishes comprise particulate mixtures of sulfur containing metallic compounds and fluorocarbon polymers and are applied to surfaces of substrates such as metallic surfaces.

Description

Technical field

The invention relates to coatings which provide the substrate with such characteristics that it is resistant to smearing and etching, permanently exhibits dry lubricity, corrosion resistance and improved wet film capture and methods of applying such coatings to the substrate.

Although the present invention is primarily directed to the coating of metal substrates, it should be noted that it is similarly applicable to the coating of other suitable substrate materials, such as ceramic compositions. It should further be noted that the metal substrates used herein range from very hard metals with a hardness measured on a Rockwell C scale greater than 40 to soft metals with a hardness value measured on a Rockwell B scale.

Accordingly, various substrate materials may be used in the present invention, provided that the material has sufficient structural integrity to withstand high pressure impacts in the application techniques used.

BACKGROUND OF THE INVENTION

To date, many different corrosion resistant coatings have been described as well as methods of applying such coatings to substrates. Examples can be found in U.S. Patent Nos. 3,574,658, 3,754,976, 4,228,670, 4,312,900, 4,333,840, 4,415,419,

552,784, 4,553,417 and 4,753,094.

Some of the aforementioned patents disclose methods of applying coatings to the surface of piece products by shot blasting or sand blasting processes in which the coating material is applied to the surface of pellets or other crushed material and is directed against the surface of the piece products on the surface of the piece product. For example, U.S. Pat. No. 3,574,658 discloses a method of applying a dry grease of molybdenum disulphide or tungsten sulphide as a coating to a crushed material and then applying the dry lubricant to the surface of the piece products as a coating. U.S. Pat. No. 3,754,976 discloses a coating process in which pulp and powdered metal are injected against the surface of a piece product that has been previously cleaned by a moderate jet of blasting particles in the absence of coating material. U.S. Pat. No. 4,228,670 discloses a process in which steel or glass pulp is mixed with a lubricant and blown against the surface of the piece product. U.S. Pat. No. 4,312,900 discloses a method in which the surface of a piece product is initially punched by debris blowing using pictorial materials such as glass or sand, followed by polishing with dry molybdenum disulfide into wells formed on the surface of the piece product by blowing the pulp. U.S. Patent No. 4,552,784 discloses another method of applying a metal powder to the surface of a piece by shot blasting. U.S. Pat. No. 4,753,094 is again a method in which a thin film of molybdenum disulphide is applied to a substrate by blasting to adhere molybdenum disulphide to the substrate surface as a coating thereof.

None of the above descriptions provide products demonstrating the combination of characteristics and properties achieved with the products of the present invention, nor provide methods of making such products. There is a need for an extended surface lifetime of substrates such as metal surfaces and a reduction in their frictional properties in order to reduce repair and replacement costs, and is the focus of intensive research and development.

However, only relatively limited successes have been achieved by the use of already known coatings, paints and lubricants (both wet and dry). Each of the known techniques for treating substrates such as metal surfaces presents considerable problems and disadvantages in terms of cost, application difficulties, properties of the product obtained, and the like.

It is expected that by the method of the invention a surface modification is achieved in which several polymers bind to the surface of the workpiece or substrate being processed. For these purposes, the term bond or bound will refer to either physical or chemical bonds that arise in the products and are demonstrated by the desired characteristics. Based on this assumption, there is a hypothesis that the coatings of the invention are not coatings, but are permanently bonded to the substrate and can only be removed by stressing the substrate surface itself. Accordingly, the surface treatment methods of the present invention result in permanent surface treatment products that are long-lasting, have a permanent dry corrosion resistance that has not yet been achieved.

Fluorocarbon polymers such as tetrafluoromethylene (TEE), available, e.g., are commonly used in known methods utilizing polymers to impart desirable physical properties to substrate surfaces such as metal substrates. under the name Teflon ”by E.I.Du Pont de Nemours and Co. (Inc.) as a coating material. Teflon coated surfaces are known to reduce ster and adhesion, but must be applied to the substrate using primers such as epoxy compounds. Accordingly, the coated coatings are abraded under moderate pressure, these coatings are not uniform or thin and require high application temperatures.

SUMMARY OF THE INVENTION

The present invention overcomes many of the known drawbacks of the prior art. The invention encompasses the preparation of a particulate mixture of sulfur-containing metal compounds such as molybdenum or tungsten sulfide and a fluorocarbon polymer such as tetrafluoromethylene, preferably in a ratio of from about 1: 1 to about 10: 1 parts of a fluorocarbon polymer to a metal compound ( based on weight percent).

The pressurized stream of particulate composition is impacted on the substrate surface at sufficient pressure and for a sufficient time to cause surface modification, the particulate composition and surface interacting with each other. As a result of applying such coatings to the substrate surface, the resulting product exhibits excellent corrosion resistance as well as long-term durability and permanent dry lubricity. In addition, it has been found that the surface treatments provide a relatively thin, impermeable, surface-curing surface treatment of the substrate or piece. These coatings have been found to be sufficiently thin so that the coatings do not interfere with the critical tolerances of any treated parts or components.

Accordingly, the main object of the present invention is to provide new and improved coatings for application to substrates and to provide methods of applying such coatings to substrates.

Another object is to provide corrosion resistant finishes characterized by long life durable dry lubricity characteristics as well as providing an impermeable, surface-curing outer surface on the substrate.

Another object is to provide methods for preparing coatings on substrates that are corrosion resistant, have a long service life, and have a permanent dry lubricity.

Another object is to provide a surface-treated product having a high degree of dry lubricity.

Another object is to provide a metal surface exhibiting long life, durable dry lubricity and high resistance to temperature extremes.

Yet another object is to provide methods for preparing such thin coatings that exhibit long life, durable dry lubricity, corrosion and heat resistance, as well as improved thin film capture (or retention) properties.

Yet another object is to provide methods of relatively fast and inexpensive application of the coatings of the present invention to the surface of substrates.

Other objects of the invention, in addition to the above, will be apparent to those skilled in the art from the following description.

Description of the drawings

Fig. 1 is a schematic flow diagram illustrating the method of the present invention used to apply a dry lubricating, corrosion resistant coating to a substrate surface.

The figure is a schematic flow diagram representing an embodiment of the methods of the present invention for applying coatings to a substrate.

In the embodiment of the invention shown in FIG. 1, a multistage process is illustrated in which the substrate surface is first subjected to an optional solvent pre-treatment step to remove any free surface contaminants such as hydrocarbons and other physical and chemical residues from the substrate prior to further processing. This pre-cleaning step is used to reduce the contamination that may be encountered and which may interfere with the application of the surface treatment to the surface by blasting.

The suitable solvent used in this pretreatment is substrate specific. For example, very contaminated, fatty substrates will require Stoddard's solvent to clean the surface of the substrate. For non-degassing substrate surfaces such as chrome / molybdenum or stainless steel, 1,1,1-trichloroethane or an equivalent solvent may be used in the ultrasonic cleaning process. For degassing substrates, Barnson's IS solvent is used in the ultrasonic cleaning process.

In a specific solvent pre-treatment process used in the laboratory, the metal substrate is abraded with a brush in a Stoddard solvent using a Hurri-Safe Special Formula Dagreaser at a 1: 4 dilution in the cold part of a Hurri-Kleen washing machine, and the substrate is then air dried. Thereafter, the material is purified either in a Barnson IS formulated cleaning solution, 1:10 dilution or pre-purified in 1,1,1, -trichloroethane (available from Brownella) using an indirect method in a Branson 8200 Ultrasonic Cleaner filled with Branson IS formulated cleaning solution, dilution 1:10. The purification time is about 15 min at 40 ° C.

As shown in the figure, upon completion of the solvent pre-purification step, the substrate is then subjected to an abrasive cleaning / surface disruption step to provide a sufficient and appropriate amount of undisturbed surface area of the substrate to interact with the surface treatment material, which is then applied. In this abrasive purification step, any oxidizing or contaminant substances that have not been removed in the pre-purification step are removed from the substrate material.

This degree of abrasive cleaning / surface disruption may be performed in the blasting chamber in accordance with the procedure described for pre-cleaning in US Patent No. 4,753,094 (the disclosure of which is incorporated herein by reference). Specific processing parameters at this stage of the process are selectable depending on the substrate material and its intended end use. For example, inlet pressure / velocity, temperature, inlet angle, blasting time, and similar process parameters are optional and will vary depending on the final treatment of the substrate and its intent - increased dry lubricity, wear resistance, rapid release (ie non-stick effect), working temperature and / or corrosion resistance ranges.

As regards the blasting materials used in this degree of abrasive cleaning / surface degradation, it has been found that for softer, non-ferrous metals and alloys (e.g., aluminum, copper, lead, magnesium, zinc, beryllium, gold, tin, bronze, brass etc.) glass beads, nylon or plastic particles or aluminum shot can be used to blast cleaned substrate surface. For hard non-ferrous metals (eg nickel) and ferrous metals and alloys (eg iron, molybdenum, chromium, tungsten, vanadium, steel and stainless steel), alumina particles, silica carbide particles, glass beads, sand particles can be used , steel shot and the like for shot blast cleaning. In this regard, it has been found that less aggressive media (e.g., glass drugs) can be used for applications where characteristics such as rapid release or non-stick properties are desired, while more aggressive media such as alumina or silica carbide are preferred. for use in applications where characteristics such as increased wear resistance or dry grease are required for the final product.

In view of the feed pressures used in this abrasive cleaning step, it is believed that pressures up to 1,750 kPa can be used for hard and very hard substrates such as chrome / molybdenum steel and tungsten carbides, while lower feed pressures less other than 140 kPa may be used in other applications. As used herein, the inlet pressure is defined as the blasting pressure applied to the substrate at a distance of 5.09 cm from the nozzle of the supply device.

The temperature range used to carry out this abrasive cleaning step is a matter of choice and is not essential to achieving surface treatment. In addition, temperatures ranging between ambient temperature and about 50 ° C have been found to be suitable for the purification step.

In the specific degree of abrasive cleaning / surface degradation used in the laboratory, substrates that are cleaned / degraded are treated with alumina (particularly fine -rownells) using Techni Blast Model 36 cleaning equipment, available under the name SURFGRÄD at 58 square feet per minute at a pressure of 100 pounds. This cleaning device has a 3/16 inch blasting nozzle with a ceramic nozzle. Alternatively, substrates that are cleaned / disrupted by glass beads (No. 270 US sieve-Brownells size) are shot blasted using a Trinco Direct Pressure Cabinet Model 36X30 / PC with 1/4 inch nozzle (ID) and the substrates are shot blasted at 420- 840 kPa (preferably at 560 to

700 kPa) from a distance between about 5.08 cm to 20 cm) at an angle of about 20 ° to 90 ° (preferably about 30 ° to 60 °) until a uniformly disrupted surface is obtained and all surface impurities are removed.

In the third step shown in the figure, the substrate is air-cleaned, using dry, compressed air to remove any residual media from cleaning / disruption, thereby avoiding any possible cross-contamination by different media.

When the one, two and three preliminary purification steps are completed, the substrate is processed under the conditions of the invention.

In accordance with the present invention, the pressurized particulate mixture of sulfur-containing metal compounds and a fluorocarbon polymer is conducted in a pressurized stream so as to impact the substrate surface at sufficient pressure and for a sufficient time to interact with the particulate mixture with the substrate; surprisingly, a thin, impermeable, surface-curing, corrosion-resistant, permanent dry-lubricating surface finish of the substrate surface was obtained.

In practice, the substrate to be treated is preferably a metal surface. However, as noted above, the substrate may be any ferrous or non-ferrous metal or a metal alloy or ceramic composition.

In order to accelerate the impact or blasting of the particles against the surface of the substrate, it has been found that a suitable blasting medium having a suitable shot size can be used to transfer the mixture to a pre-disturbed surface of the substrate. Another purpose of the blasting medium, in addition to being a carrier for the surface finishing material, is to cure the top surface by the blasting process. A suitable blasting medium for use according to the invention is selected as a function of its compatibility with the substrate and its affinity for the particulate material it carries.

In addition, the size and hardness of the blasting medium affects, as has been found, the efficient transfer of the finishing material to the cleaned, disrupted substrate surface. In this regard, it has been found that suitably size pellets within the SAE size no. S70 to about S780 (preferably about S70 and S230, most preferably about S70). Softer metal substrates (such as those having a Rockwell B scale or a Rockwell C scale in the range of 40 and below) have been found to advantageously use larger size pellets (such as about SAE size 170 and higher) to achieve maximum final surface coverage. It has also been found that in hard metals (Rockwell C scale 40 and above) such large pellets (i.e., SAE No. S170 and above) are equally advantageous for achieving continuous surface coverage. It should be noted, however, that smaller shot sizes may also be used in certain applications to avoid surface roughness.

Examples of suitable shot blasting media that can be used according to the invention are steel shot, stainless steel shot, aluminum shot, plastic shot, and the like having sufficient structural integrity to withstand impact on the substrate surface.

Generally, the coating providing composition of the invention is a particulate mixture of solid lubricants formulated to provide dry lubricity and / or corrosion resistance and / or non-tack properties required for the end use of the product. Suitable solid lubricants for use in the particulate compositions of the present invention include fluorocarbon polymers and carrier or bonding polymers.

Examples of suitable fluorocarbon polymers are homogenates or mixtures of finely divided fluorocarbon resins having fully fluorinated carbon chains such as tetrafluoroethylene homopolymer (TEE), hexafluoropropylene (HFP), perfluoroalkoxyvinyl ether (PPVE) copolymers (PPVE). Other suitable fluorocarbon polymers are fluoropolymer resins that are not fully fluorinated, such as ethylene tetrafluoroethylene (ETFE), polyvinylidene fluoride (PVDF), ethylene chlorotrifluoroethylene (ECTFE), ethylene copolymers and TFE, such as products available under the name E . (Inc.). The molecular weight of the fluorocarbon polymers used in the present invention may vary over a wide range, although molecular weights of from about 800 to about 2000 and especially about 1000-1800 are preferred. It should further be noted that mixtures of fluorocarbon polymers of different molecular weights can be advantageously used according to the invention, such as mixtures of tetrafluoroethylenes having molecular weights of 1100 and 1300.

Collectively, the fluorocarbon polymers are selected according to their ability to provide their individual substrate characteristics and their affinities to the substrate, the blasting medium used and / or other selected solid lubricating material. Further suitable are fluorocarbon polymers for use according to the invention impermeable and chemically non-reactive to water and other solids, UV radiation and gases. The polymers are highly thermally stable and will withstand high surface temperatures (i.e., about 204 to 260 ° C) as a result of their C-F and C-C binding forces and the non-polar nature of the linear polymer. These resins have a low smearing coefficient and a low dielectric constant and a loss factor. They exhibit a high degree of linear flexibility and are fireproof.

Other solid lubricant components of the particulate composition used according to the invention are sulfur-containing metal compounds which act as a carrier or binder molecule in the process of the invention. Suitable metal sulfides for the purposes of the present invention have anti -oteric / dry oil properties, can withstand elevated processing temperatures and / or exhibit a high affinity for metals used herein as substrates or blasting media as well as exhibit a high affinity for fluorocarbon polymers selected as part of the coating mixture.

Representative of suitable sulfur-containing metal compounds for use in the present invention are molybdenum, tungsten, lead, tin, copper, calcium, titanium, zinc, chromium, iron, antimony, bismuth, silver, cadmium and alloys and mixtures thereof.

Preferably, molybdenum disulfide is used as the sulfur-containing metal compound in particulate compositions. Molybdenum disulfide has a high affinity for steel and other base metals and has the ability to increase surface hardness, corrosion resistance, heat resistance and dry grease. It also has a high affinity for the fluoro-micro-dusts which can be advantageously used according to the invention. It has been found that the use of molybdenum disulfide provides two functions here, both a dry lubricant additive and a carrier / binder molecule for a fluorocarbon polymer to improve the blast media coating.

Generally, the amount of fluorocarbon polymer that is incorporated into the particulate composition to provide the desired surface finish is determined by the amount of polymer required for saturated carrier or binder molecules such as molybdenum disulfide. The total amount of particulate composition used to apply the finish to the substrate by blasting in the blasting cabinet is determined by the amount of material required to maintain the fully coated blasting medium during the blasting operation in the chamber.

In a laboratory embodiment of the practical example of the present invention, a Techni Blast Model 36 SURFGARD Peen Plating Machine, 70 cubic feet per minute at 100 pounds pressure, 3/16 inch ceramic nozzle jet nozzles are used to guide the particulate mixture against the substrate surface in the blast chamber. . The chamber is filled with 500 ml (volume) of molybdenum disulphide (super fine, lot # 510DS, Climax Molybdenum Co.), 500 ml (volume) of tetrafluoroethylene, having a molecular weight of about 1100 (Teflon Fluoroadditive Type MP 1100, lot no.BM ÄBA 0D002 , Du Pont), 500 ml (volume) tetrafluoroethylene, having a molecular weight of about 1300 (Teflon Fluoroadditive Type MP1300, Lot # 68-86, Du Pont) and 0.906 kg S70 steel shot (Techni Blast). The temperature in the blasting chamber was maintained at about 50 ° C and the feed pressure at the blasting nozzle was 560 kPa. The particulate mixture with the blasting medium was guided at a 43 ° angle at a distance of about 15.24 to 20.32 cm, until a uniform, void-free surface treatment was achieved.

Upon completion of step four in the figure, where a surface treatment is applied to a substrate in accordance with the method of the invention, it has been found that the resulting product may preferably be subjected to a subsequent purification and protection step (step five in the figure). At this stage of the process, the substrates having the applied surface treatment of the invention are cleaned with dry, compressed air to remove any remaining particles from the surface treatment. The substrate is washed with a cleaning solution and protected with an oil that is compatible with the end use of the material, if desired.

In a preferred embodiment of the present invention, the surface treatment is performed on a 5.08 cm x 5.08 cm, 0.6 cm thick chrome / molybdenum steel sample surface. The hardness of the chromium / molybdenum steel sample was 53 measured on a Rockwell C scale. In this method, after pre-cleaning the sample in a suitable solvent, a sample is subjected to a degree of abrasive cleaning / surface disruption in a chamber where alumina pellets were applied to the steel surface at 420 kPa at an angle of about 45 ° at ambient temperature.

The sample is then introduced into the blast chamber and a Techni Blast Model 36 SURFGARD Peen Plating Machine, having a 3/16 inch suction blasting nozzle with a ceramic nozzle is used to guide the particulate mixture against the sample surface. The particulate mixture is prepared by mixing 620 g (by weight) of tetrafluoroethylene having a molecular weight of about 1500 (Teflon Fluoropromdditive Type MP 1500J, Lot No. 999999) in a container with 45.3 kg SAE No. S.170 steel pellets. Then 410.93 g (w / w) of tetrafluoroethylene (MP1500J) is admixed to the steel shot in the same container. Mix in a separate container

850.2 g (w / w) molybdenum disulphide (superfine, batch No. 510DS, Climax Molybdenum Co.) with 45.3 kg of SAE No. 17 O steel pellets.

The contents of the two vessels were then mixed and an additional 688 g (w / w) of tetrafluoroethylene (MP500) was added. This combined mixture contains 1723 g (w / w) of tetrafluoroethylene, approximately 13.5 kg (w / w) of inolybdenum disulphide with about 85 kg of SAE No. S170 steel pellets. The resulting combined mixture has a weight ratio of tetrafluoroethylene to molybdenum disulfide of about 2: 1.

The temperature in the blasting chamber is maintained at about 50 ° C and the feed pressure at the blasting nozzle is 560 kPa. Steel shot pellets as a blasting medium having a particulate mixture placed as a coating on the surface of the shot pellets are spurted onto a pre-cleaned, distorted sample surface at an angle of about 45 ° from about 10.16 cm for about 15 seconds to form a uniform surface without voids chromium / molybdenum steel samples.

After blasting, the sample is subjected to a purification subsequent to treatment with a Stoddard solvent in a Hurri-Kleen apparatus. This purification step is followed by purification of the resulting product in 1,1,1-trichlorethylene in a 100 ml beaker and prior to evaluation, the resulting purified surface treated product is air dried.

The resulting product has been found to have a surface that is resistant to sterile and etching, durable, corrosion resistant and has characteristics of dry lubricity and unusual wet film capture.

The method of preparing a coating on a substrate described herein is a method that provides a product exhibiting a wide range of improvements otherwise unattainable. The coated product has a permanently dry lubricity and is highly resistant to thermal extremes. In addition, the surface-treated product provides a natural defense against conventional oxidation and corrosion because it is chemically inert. Further, the surface finish of the treated substrate exhibits exceptional durability and is extremely thin as measured is less than about 0.5 microns as opposed to prior art coatings where the coating was measured in thousandths of an inch (0.00254 cm) than industrial coatings. standard electro-deposited nickel coatings having a thickness of 3/8 mils when immersed in a solution for nickel coating for 45 minutes at 90.5 ° C. Still further, the coatings of the present invention are applied relatively easily even at relatively low temperatures and inexpensively in order to provide the desired surface modification of the invention.

The products made according to the invention have many uses in various industries and in products containing metal to metal friction points or which are subject to corrosion on the metal surface. Examples of the scope of the present invention include applications in the automotive industry, fuel handling systems, power tools and equipment, buckles, ball bearings, wheels and other anti friction components, consumer products, including cookware, household utensils and razors, turbines, toothed wheels and other transmission devices as well as in many other potential applications.

Although the invention has been described in its preferred form and with a certain degree of specificity, it is to be understood that the description is by way of example only. Many changes can be made to the details and working stages of the methods and materials used, rather than being out of scope ^; The invention and its ideas as defined in the appended claims.

Claims (36)

PATENT CLAIMS 1. A method of effecting a surface treatment on a substrate surface comprising preparing a particulate mixture of a sulfur-containing metal compound and a fluorocarbon polymer, casting a pressurized jet of material comprising the particulate mixture onto the substrate surface and treating the surface of said substrate with a jet of material at sufficient pressure for sufficient time to cause the particulate mixture to interact in said stream with the surface of the substrate providing a thin impermeable, surface-curing, corrosion-resistant, durable, dry-lubricating surface finish of said substrate. 2. The method of claim 1 wherein said substrate is a metal. The method of claim 1, wherein said substrate is a ceramic composition. The method of claim 1, wherein said particulate composition binds to a substrate surface during impact of a flow of material onto said surface. The method of claim 1, wherein said sulfur-containing metal compound is molybdenum disulfide. The method of claim 1, wherein the sulfur-containing metal compound is a compound selected from the group consisting of tungsten, lead, tin, copper, calcium, titanium, zinc, chromium, iron, antimony, bismuth, silver, cadmium sulfides. and alloys and mixtures thereof. 7. The process of claim 1 wherein said fluorocarbon polymer is tetrafluoroethylene. The method of claim 7, wherein said tetrafluoroethylene has a molecular weight of about 800-2000. The method of claim 1, wherein the fluorocarbon polymer is a blend of tetrafuluoroethylene of different molecular weight, including tetrafluoroethylene having a molecular weight of about 1100 and tefluoroethylene having a molecular weight of about 1300. 10. The process of claim 1 wherein said fluorocarbon polymer is selected from the group consisting of hexafluoropropylene, perfluoroalkoxyvinylether, copolymers of tetrafluoroethylene and hexafluoropropylene, copolymers of tetrafluoroethylene and perfluoroalkoxyvinyl ether, ethylene ether, ethylene ether, ethylene ether, ethylene ether, ethylene ether, ethylene ether, ethylene ether. . The method of claim 1, wherein the material stream is conducted at a mixture pressure of about 140 kPa and about 840 kPa. The method of claim 1, wherein the material pressure stream comprises a blasting medium selected from the group consisting of steel shot, stainless steel shot, alumina shot, plastic shot and mixtures thereof. . The method of claim 1, comprising pre-cleaning the surface of said substrate before the impact treatment of this surface rial. by the current The method of claim 13, v y z n and s a by said pre-cleaning comprising abrasive cleaning and surface disruption. The method of claim 1, v y z n and s a comprising cleaning and protecting the substrate after impact treatment of the surface of the substrate with a flow of material. 16. A method of preparing a surface treatment of a metal substrate comprising preparing a particulate mixture of molybdenum disulphide and a fluorocarbon polymer, dropping said particulate mixture in combination with a blasting medium onto a metal substrate surface, and treating the surface of said substrate by impacting the blasting medium combination; % of the particulate composition in such a way that said particulate composition and the surface of said substrate interact with each other and provide a surface impermeable, surface-curing, corrosion-resistant, durable, dry-lubricating finish to said substrate. 17. The method of claim 16 wherein said fluorocarbon polymer is tetrafluoroethylene. 18. The method of claim 17, wherein said particulate composition chemically binds to said surface of said metal substrate upon impact of a combination of blasting medium and particulate composition on said surface. The method of claim 17, wherein said tetrafluoroethylene has a molecular weight of about 800 to 2000. 20. The method of claim 16, wherein said fluorocarbon polymer is a mixture of tetrafluoroethylenes of different molecular weight, comprising tetrafluoroethylene of about 1100 molecular weight and tetrafluoroethylene of about 1300 molecular weight. 21. The method of claim 16, comprising pre-cleaning the surface of said metal substrate before impacting said surface with said stream of material. The method of claim 21, wherein the pre-cleaning comprises abrasive cleaning and surface disruption. 23. The method of claim 16, wherein said substrate is subjected to a cleaning and protective treatment after impact treatment of said substrate surface with said stream of material. 24. A surface-treated product comprising a substrate having a surface and a particulate mixture of a sulfur-containing metal compound and a fluorocarbon polymer acting on said substrate surface to form an impermeable, surface-curing, corrosion-resistant, durable, dry corrosion finish. surface of said substrate. 25. The product of claim 24, wherein said substrate is a metal. 26. The product of claim 24 wherein said substrate is a ceramic composition 27. The product of claim 24, wherein said particulate composition is chemically bonded to a surface of said substrate material. 28. The product of claim 24 wherein said sulfur-containing metal compound is molybdenum disulfide. The product of claim 24, wherein said sulfur-containing compound is a compound selected from the group consisting of tungsten, lead, tin, copper, calcium, titanium, zinc, chromium, iron, antimony, bismuth, silver, cadmium sulfides. and alloys and mixtures thereof. 30. The product of claim 24, wherein said fluorocarbon polymer is tetrafluoroethylene. 31. The product of claim 30, wherein said tetrafluoroethylene has a molecular weight of about 800 to 2000. 32. The product of claim 24 wherein said fluorocarbon polymer is a mixture of tetrafluoromethylenes of different molecular weights, including tetrafluoroethylene of about 1100 and tetrafluoroethylene of about 1300. 33. The product of claim 24, wherein said fluorocarbon polymer is selected from the group consisting of hexafluoropropylene, perfluoroalkoxyvinyl ether, copolymers of tetrafluoroethylene and hexafluoropropylene, copolymers of tetrafluoroethylene and perfluoroalkoxyvinyl ether, ethylene ether ethylene ether, ethylene ether ethylene ether, ethylene ether ethylene ether, ethylene ether ethylene ether, ethylene ether . 34. A surface-treated product comprising a metal substrate having a surface and a particulate mixture of molybdenum disulphide and a fluorocarbon polymer that interact with said substrate surface to provide an impermeable, cure-resistant, corrosion-resistant, dry-resistant surface. lubricating the surface of said substrate. 35. The product of claim 34, wherein said fluorocarbon polymer is tetrafluoroethylene. 36. The product of claim 35, wherein said particulate composition is chemically bonded to said surface of said metal substrate. 37. The product of claim 35, wherein said tetrafluoroethylene has a molecular weight of about 800 to 2000. 38. The product of claim 36, wherein said fluorocarbon polymer is a mixture of tetrafluoroethylenes of various molecular weights, including tetrafluoroethylene of about 1100 and tetrafluoroethylene of about 1300.