摘要:
Aluminum or aluminum alloy is first anodized to form an oxide film thereon. The anodized basis metal is electrolyzed by use of alternating current in an electrolytic solution which is prepared by adding formaldehyde, usually as formalin, and a thiosulfate to an acid solution of stannous sulfate. The acid solution of stannous sulfate can be prepared by dissolving stannous sulfate in an aqueous solution of sulfuric acid, sulfamic acid, tartaric acid or the like.
摘要:
Disclosed is an encoder including a rotary member and a fixed member. The fixed member is provided with an electrode having A-channel, B-channel and C-channel patterns, the rotary member is provided with contacts which are to be opposed to the electrode. A-C state switches from OFF to ON at each rotation of the rotary member for one click angle from a stable click position in both CW and CCW direction. During CW rotation for one click angle, B-C state remains unchanged from OFF; during CCW rotation for one click angle, B-C state switches twice between ON and OFF.
摘要:
Disclosed is an encoder including a rotary member and a fixed member. The fixed member is provided with an electrode having A-channel, B-channel and C-channel patterns, the rotary member is provided with contacts which are to be opposed to the electrode. A-C state switches from OFF to ON at each rotation of the rotary member for one click angle from a stable click position in both CW and CCW direction. During CW rotation for one click angle, B-C state remains unchanged from OFF; during CCW rotation for one click angle, B-C state switches twice between ON and OFF.
摘要:
Disclosed are a method for electrolytically coloring an aluminum material which is capable of coloring an anodic oxide film in a gray color and a gray-colored aluminum material obtained thereby. In a method for electrolytically coloring an aluminum material having the anodic oxide film formed on the surface thereof in an electrolytic coloring solution containing an inorganic metal salt, a strongly acidic electrolytic coloring solution containing sulfuric acid, stannous sulfate, nickel sulfate, and ammonium sulfate and having a pH of not more than 2.5 is used as the electrolytic coloring solution. Preferably the electrolytic coloring solution contains sulfuric acid at a concentration in the range of 3 to 30 g/liter, stannous sulfate at a concentration in the range of 0.1 to 3.0 g/liter, nickel sulfate at a concentration in the range of 10 to 100 g/liter, and ammonium sulfate at a concentration in the range of 20 to 100 g/liter. By this method, a gray-colored aluminum material possessed of an anodic oxide film colored in an achromatic or substantially achromatic gray color is obtained.
摘要:
The present invention provides high strength magnesium-based alloys which are composed a fine crystalline structure, the alloys having a composition represented by the general formula (I) Mg.sub.a X.sub.b ; (II) Mg.sub.a X.sub.c M.sub.d, (III) Mg.sub.a X.sub.c Ln.sub.e ; or (IV) Mg.sub.a X.sub.c M.sub.d Ln.sub.e (wherein X is one or more elements selected from the group consisting of Cu, Ni, Sn and Zn; M is one or more elements selected from the group consisting of Al, Si and Ca; Ln is one or more elements selected from the group consisting of Y, La, Ce, Nd and Sm or a misch metal of rare earth elements; and a, b, c, d and e are atomic percentages falling within the following ranges: 40.ltoreq.a.ltoreq.95, 5.ltoreq.b.ltoreq.60, 1.ltoreq.c.ltoreq.35, 1 .ltoreq.d.ltoreq.25 and 3.ltoreq.e.ltoreq.25). Since the magnesium-based alloys have a superior combination of properties of high hardness, high strength and good processability, they are very useful in various industrial applications.
摘要翻译:本发明提供由具有通式(I)MgaXb表示的组成的合金构成的微细晶体结构的高强度镁基合金; (II)MgaXcMd,(III)MgaXcLne; 或(IV)MgaXcMdLne(其中X是选自Cu,Ni,Sn和Zn中的一种或多种元素; M是选自Al,Si和Ca中的一种或多种元素; Ln是一种或多种 选自Y,La,Ce,Nd和Sm的稀土元素或稀土元素的混合稀土元素; a,b,c,d和e是以下范围内的原子百分比:40 <= a < 95,5 <= b <= 60,1 <= c <= 35,1 <= d <= 25和3 <= e <= 25)。 由于镁基合金具有高硬度,高强度和良好加工性能的优异组合,因此它们在各种工业应用中非常有用。
摘要:
Disclosed is a corrosion resistant aluminum-based alloy which is composed of a compound having a composition consisting of the general formula: Al.sub.a M.sub.b Mo.sub.c X.sub.d Cr.sub.e wherein: M is one or more metal elements selected from the group consisting of Ni, Fe, Co, Ti, V, Mn, Cu and Ta; X is Zr or a combination of Zr and Hf; and a, b, c, d and e are, in atomic percentages; 50%.ltoreq.a.ltoreq.89%, 1%.ltoreq.b.ltoreq.25%, 2%.ltoreq.c.ltoreq.15%, 4%.ltoreq.d.ltoreq.20% and 4%.ltoreq.e.ltoreq.20%, the compound being at least 50% by volume composed of an amorphous phase. The Al-based alloy exhibits a very high corrosion resistance in severe corrosive environments, such as hydrochloric acid solution or sodium hydroxide solution, due to the formation of a highly passivative protective film. Therefore, the alloy exhibits a good durability in long services under such severe corrosive environments.
摘要:
The present invention provides a corrosion resistant aluminum-based alloy consisting of a compound which has a composition represented by the general formula:Al.sub.a M.sub.b Mo.sub.c Hf.sub.d Cr.sub.ewherein:M is at least one metal element selected from Ni, Fe and Co and a, b, c, d and e are atomic percentages falling within the following ranges: 50%.ltoreq.a.ltoreq.88%, 2%.ltoreq.b.ltoreq.25%, 2%.ltoreq.c.ltoreq.15%, 4%.ltoreq.d.ltoreq.20% and 4%.ltoreq.e.ltoreq.20%,the compound being at least 50% by volume composed of an amorphous phase. The aluminum-based alloys not only have a high degree of hardness, strength and heat resistance but also exhibit a significantly improved corrosion resistance.
摘要:
Method for drying poly(.alpha.-olefins) comprising contacting poly(.alpha.-olefins) having a content of hydrocarbon medium of 0.2 to 2% by weight with nitrogen gas having substantially no hydrocarbon medium and having a dew point of -10.degree. C. or lower in counterflow in a silo type through-flow drying apparatus whereby poly(.alpha.-olefins) having a content of the hydrocarbon medium of less than 0.2% by weight can be obtained.
摘要:
Aluminum or aluminum alloy is first anodized to form an oxide film thereon. With the pores in this oxide film unsealed, the basis metal is then electrolyzed by use of alternating current at a preselected starting voltage, and this voltage is lowered at least once before completion of the electrolytic coloring of the basis metal. The electrolytic solution in which the electrolysis is effected contains either at least three metallic salts or at least two metallic salts and a strong reducing compound.
摘要:
Aluminum or aluminum alloy is first anodized to form an oxide film thereon. Before being colored electrolytically in an electrolytic solution, the anodized basis metal is made anodic in this solution, and direct current is passed therethrough. The basis metal is then electrolyzed in the same solution by use of alternating current for actual coloring operation. The electrolytic solution in use contains at least two metallic salts, together with or without a strongly reducing compound.