| WO/2016/175447 | METAL ATTACHMENT METHOD AND METAL ATTACHMENT STRUCTURE USING SAME |
| JPS58112681 | GAP SETTING DEVICE FOR PRESSURE WELDING |
| JPH05217121 | METHOD FOR JOINING PARTS WEAK TO HEAT |
| US3443055A | 1969-05-06 | |||
| EP1711436A1 | 2006-10-18 |
| CLAIMS 1 . Method and metals to produce high resistance electrode anode in high ampere DC current by electro welding a Platinum / Iridium alloy to a Titanium substrate, which is preheated and with additional generation of local temperature at the contact point of the Tungsten rolling point, which applies vertical pressure while moving along the metals to be welded, the welding of this Platinum I Iridium alloy to the Titanium substrate is performed. 2. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, the Platinum I Iridium alloy has a content of from: 98% Platinum and 2% Iridium, to, 90% Platinum and 10% Iridium. 3. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, the Platinum I Iridium alloy electro welded to the Titanium layer has a thickness of 50 microns to 700 microns 4. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, the Titanium substrate for electro-welding with the Platinum / Iridium alloy is pre-heated through a DC electric current applied thereto at a temperature between: 950 degrees Celsius, to 1.050 degrees Celsius, and the temperature is maintained up to the end of electro welding. 5. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, at the point where vertical pressure is applied to the Platinum I Iridium alloy for coating Titanium, the developing temperature is between 1.600 degrees Celsius to 1.660 degrees Celsius. 6. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein the vertical pressure applied at the point of contact to the Platinum / Iridium alloy overlying the titanium substrate is between: 10kg/cm2 to 10,3kg/cm2. 7. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, the cylindrical rotatable Tungsten end contacting the Platinum / Iridium alloy overlaying the Titanium substrate has a contact surface width, relative to the circumference of the Titanium substrate, of between: 1 in 50 to 1 in 500. 8. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, the welding speed of the Platinum / Iridium alloy to the Titanium is: between 6 sec and 9 sec per running cm of surface area to be coated. 9. Method and metals to produce high resistance electrode anode in high ampere DC current according to claim 1 , wherein, the spirals in the titanium that screw the Tungsten for heating the Titanium should have a Tungsten to Titanium diameter ratio of 5/8 |
TECHNICAL FIELD
The invention, "Method and metals to produce high resistance electrode anode in high ampere DC current", refers to the method of manufacturing a high resistance electrode anode at high DC current intensity per cm 2 of anode surface, for electrolysis of water containing organics and electrolytes. In particular, the invention is the optimum incorporation by electro-welding of Platinum I Iridium alloy of a specific ratio of Platinum and Iridium and a specific thickness into a high purity Titanium rod, with predetermined: conditions: a) temperature induced by electricity, (b) Vertical pressure from a mechanism that contacts the Platinum / Iridium and Titanium alloy complex that terminates in a cylindrical shaped rotating terminal made of Tungsten; and (c) electro-welding speed of the above mentioned metals.
ADVANCED TECHNICAL STANDARD AND ITS EVALUATION
The electrode anode prepared so far by electro welding as stated in D.E 1004008 (GR) and EP 1711436, although it has satisfactory results, it has corrosion problems due to the non-uniform coating of Titanium, due to: (a) the local and only developing temperature between Titanium, Tantalum and the metal alloys included in the above- mentioned D.E. 1004008 and EP 1711436 as: Platinum, Iridium, Ruthenium, Rhodium and Palladium, (b) the low developing local temperature (c) the necessary pressure for the complete integration of the liner (d) the plating speed and (e) the composition of the used alloys, resulting in a non-uniform flow of positive constant electric current from the anode surface during its electrolytic operation, causing excessive stress on certain parts of the anode, resulting loss of the protective layer of noble metals and its premature destruction. Also, due to the mechanical stress on the surface of the anode by the continuous flow of water containing micro particles, there is a loss of the protective layer of noble metals, causing its premature destruction.
ADVANTAGES OF THE INVENTION
The anode manufactured with the present invention, "Method and metals to produce high resistance electrode anode in high ampere DC current, has uniform welding on the entire Titanium substrate, from the on-demand Platinum / Iridium alloy to which alloy, Iridium, as the hardest known natural metal gives Platinum excellent mechanical resistance to the water flow that contains micro particles. Because of the above, the anode has optimal results in terms of electrolytic decomposition of water containing organics and electrolytes, by receiving a high intensity of continuous electric current per cm 2 of anode surface, which is a necessary condition to produce strong oxidants.
DESCRIPTION
The invention, "Method and metals to produce high resistance electrode anode in high ampere DC current”, is carried out as follows: On a main substrate of Titanium rod with a melting point of 1.668 degrees Celsius, it is sandblasted and then cleaned of oxides by immersion in 25% Sulphuric acid for 3 minutes. The rod is then rinsed with de ionized water and dried by means of a hot air stream. The Titanium rod complex with Platinum I Iridium alloy, where the melting point for Platinum is at 1 .768 degrees Celsius and for Iridium at 2.446 degrees Celsius, is mounted on a specially designed machine consisting of a fixed bearing bench and a vertical precision mobile bracket, which at its end is equipped with a structure ending in a cylindrical rotating terminal made of Tungsten, the melting point of which is 3.422 degrees Celsius, temperature control instruments and two AC/DC (alternating current to direct current) conversion devices connected to a PLC. The bracket has the possibility of horizontal and vertical movement with adjustable vertical pressure through hydraulic systems and temperature measurement through an instrument on the Tungsten connector terminal. At both ends of the Titanium rod, there is a thread which has a diameter of 5/8 in relation to the diameter of Titanium and on which the Tungsten rods are screwed for the passage of the constant electric current and the creation of the electrical resistance that preheats and afterwards maintains the temperature in the Titanium rod between 950 degrees Celsius and 1.050 degrees Celsius through the PLC that receives readings from a temperature gauge on the Titanium rod and controls the flow of the constant electric current. In addition, the PLC, through readings from a pressure gauge, applies vertical pressure on the welding materials between 10kg/cm 2 to 10,3kg/ cm 2 and moves the bracket with an adjustable speed from one cm per 6 sec, to one cm per 9 sec, applying a DC electric current at the contact point of the cluster, Platinum / Iridium alloy with the Titanium which is to be welded. The contact point of the Tungsten, relative to the circumference of the Titanium and Platinum / Iridium alloy complex is, from: 1 in 50, to, 1 in 500. The temperature sensor on the Tungsten terminal at the contact point with the Platinum / Iridium alloy is connected to the PLC, which controls the flow of direct current and maintains the welding temperature between 1.600 degrees Celsius and 1.660 degrees Celsius. By the end of the predetermined route of the bracket, the PLC raises the bracket and through automatic precision mechanical divider in the bearing machine, the Titanium rod cluster with Platinum / Iridium alloy rotates as required by the divider and the process of cladding the Titanium rod with Platinum/lridium Alloy is repeated.
EXAMPLE (Figurel )
The anode manufactured with the present invention, "Method and metals to produce high resistance electrode anode in high ampere DC current", is carried out as follows: At a Titanium Grade 2 rod, 30cm long and 2,54cm diameter (a), sandblasted and chemically cleaned with acid and placed in the welding apparatus (b) tightly wrapped with 600 micrometer thick sheet of 95% platinum and 5% iridium alloy. From the first direct current [DC] source (c), a direct current is supplied to the titanium rod by the PLC through a temperature gauge (d) and the rod is heated to 1 .000 degrees Celsius. At the same time, a vertical pressure of 10,2kg/cm2 is applied to the Titanium and Platinum / Iridium alloy complex through the moving welding arm (e), which terminates in a cylindrical rotating terminal, and the vertical pressure is controlled by the PLC through a pressure gauge (f), and the arm moves under the control of the PLC at a speed of 1 cm / 7,5sec and applies, under the control of the PLC via a temperature gauge (g), a direct electric current from the second [DC] power source (h), which generates a local temperature of 1.640 degrees Celsius and the homogeneous welding / bonding of Platinum / Iridium alloy to the Titanium rod is achieved thanks to the fact that: Titanium has a lower melting point, i.e. 1 .668 degrees Celsius, compared to 1 .768 degrees Celsius for Platinum and 2.446 degrees Celsius for Iridium. The welding apparatus is equipped with a divider (i) that rotates the rod to continue the welding process. The whole process is controlled by the PLC (j)