Electro-catalytic treatment of fluids and related materials and coatings therefor

Abstract

A coating and material design are disclosed. The coating includes an alloy of nickel and molybdenum, or an oxidic compound of nickel and molybdenum, or a composite or metal matrix composite of the oxidic compound in the alloy. The alloy is selected from high molybdenum alloys, where Nickel is the balance of the elemental analysis. The oxidic compound is selected from oxides, hydrates or hydrolysed oxides of nickel and oxides, hydrates or hydrolysed oxides of molybdenum. The composite or metal matrix composite includes the oxidic compound embedded in or bonded by a metallic matrix of the alloy. The material design has a solid surface in a system for electro-catalytic treatment of a fluid under turbulent flow conditions of the fluid to be treated, the material design comprising the alloy, or the oxidic compound, or the composite or metal matrix composite described above.

What is claimed is: 
     
         1 . Material design with a solid surface in a system for electro-catalytic treatment of a fluid under turbulent flow conditions of the fluid to be treated, comprising
 i) an alloy of nickel and molybdenum, or   ii) an oxidic compound of nickel and molybdenum, or   iii) a composite or metal matrix composite of ii) in i),   wherein   i) is selected from high molybdenum alloys between 12-50 wt.-% molybdenum and iron contents below 10 wt.-% iron, where Nickel is the balance of the elemental analysis with at least 49 wt.-% Nickel,   ii) is selected from oxides, hydrates or hydrolysed oxides of nickel (NiO, Ni 2 O 5 , β-NiOOH, γ-NiOOH, Ni(OH) 2 , Ni(OH) 3 ) and oxides, hydrates or hydrolysed oxides of molybdenum (MoO 2 , MoO 3 , Magnéli-type Error! Bookmark not defined.  phases of MoO 3 ), Mo 3 O 8 xH 2 O (ilsemannite), e.g. Mo 4+ Mo 6+   2 O 8 ·nH 2 O, MoO 3 ·nH 2 0 with n=⅓, ½, 1 or 2, MoO 2.5 (OH) 0.5  or their double oxides (α-/β-NiMoO 4 , NiMoO 4 n·H 2 O),   and   iii) includes an oxidic compound from ii) embedded in or bonded by a metallic matrix of i).   
     
     
         2 . The material design according to  claim 1 , wherein the alloy is deposited by electroplating, a galvanic process, or thermal spraying. 
     
     
         3 . The material design according to  claim 2 , wherein the substrate is selected from any alloys sufficiently resistant to corrosion in respect to the application. 
     
     
         4 . The material design according to  claim 1 , wherein the alloy is casted. 
     
     
         5 . The material design according to  claim 1 , wherein the alloy is sintered with either on open or closed porosity. 
     
     
         6 . The material design according to  claim 2 , wherein the surface is roughened to Ra of 3-4 μm and above. 
     
     
         7 . The material design according to  claim 2 , wherein the surface is pre-oxidized. 
     
     
         8 . The material design according to  claim 1 , wherein the oxidic compound is composed of individual composition of the said oxides, hydrates or hydrolysed oxides of nickel and molybdenum including their doubles as said by ii). 
     
     
         9 . The material design according to  claim 1 , wherein the oxidic compound is deposited by thermal or cold gas spraying. 
     
     
         10 . The material design according to  claim 1 , wherein oxidic compound is a sintered body with either on open or closed porosity. 
     
     
         11 . The material design according to  claim 1 , wherein 10-90 vol. % of the oxidic compound are embedded in or bonded by a metallic matrix as by that said i) and  claim 3  and form a composite or metal matrix composite or hybrid material. 
     
     
         12 . The material design according to  claim 1 , wherein the composite or metal matrix composite or hybrid material is a sintered body with either an open or closed porosity. 
     
     
         13 . The material design according to  claim 1 , wherein the composite or metal matrix composite or hybrid material is deposited by thermal or cold gas spraying. 
     
     
         14 . A coating comprising:
 i) an alloy of nickel and molybdenum, or   ii) an oxidic compound of nickel and molybdenum, or   iii) a composite or metal matrix composite of ii) in i),   wherein   i) is selected from high molybdenum alloys between 12-50 wt.-% molybdenum and iron contents below 10 wt.-% iron, where Nickel is the balance of the elemental analysis with at least 49 wt.-% Nickel,   ii) is selected from oxides, hydrates or hydrolysed oxides of nickel (NiO, Ni 2 O 5 , β-NiOOH, γ-NiOOH, Ni(OH) 2 , Ni(OH) 3 ) and oxides, hydrates or hydrolysed oxides of molybdenum (MoO 2 , MoO 3 , Magnéli-type Error! Bookmark not defined.  phases of MoO 3 ), Mo 3 O 8 xH 2 O (ilsemannite), e.g. Mo 4+ Mo 6+   2 O 8 ·nH 2 O, MoO 3 ·nH 2 0 with n=⅓, ½, 1 or 2, MoO 2.5 (OH) 0.5  or their double oxides (α-/β-NiMoO 4 , NiMoO 4 n·H 2 O),   and   iii) includes an oxidic compound from ii) embedded in or bonded by a metallic matrix of i).   
     
     
         15 . An object coated with the coating of  claim 14 . 
     
     
         16 . The object of  claim 15 , wherein the object is farm machinery.