An integrated control method for anti-corrosion and anti-fouling of water jet propulsion channel system

Abstract

The invention belongs to the technical field of ship corrosion and fouling prevention and relates to an anti-corrosion anti-fouling integrated control method for a flow channel system of a water-jet propeller. The method comprises the following steps: designing the anodic working area according to a polarization curve of total protection current and an anode, designing an embedded anodic structure pattern along water flow according to the characteristics of a flow channel structure, controlling a multi-channel switch type constant-potential instrument to output current based on a reference electrode B during operation of the flow channel system of the water-jet propeller, and enabling the cathodic protection potential of the flow channel to be -0.80V; detecting the anodic potential through a reference electrode A, controlling the flow channel system of the water-jet propeller to automatically adjust the output current, detecting the cathodic protection potential of the flow channel, and keeping operation of the flow channel system of the water-jet propeller when the potential is -0.80V to -1.05V through measurement, so that the anti-corrosion anti-fouling integrated control is realized. According to the method, a power supply is small in size, convenient to mount and environmentally friendly; the auxiliary anode is low in cost, long in service life, scouring-resistant, low in consumption rate, good in reliability and long in maintenance cycle; the potentials in the flow channel are uniformly distributed.

Description

Technical field: [0001] The invention belongs to the technical field of anti-corrosion and anti-fouling of ships, and relates to an integrated control method for anti-corrosion and anti-fouling of a water jet propulsion channel system, which adopts an anti-scouring oxide anode material and an intelligent power supply, and optimizes working parameters through reasonable system design, so that While the flow channel receives cathodic protection current, the anode generates hypochlorous acid or chlorine gas to achieve anti-fouling, thus obtaining good corrosion protection and effective anti-fouling effect. Background technique: [0002] At present, the water jet propulsion system is a new type of ship propulsion system with high efficiency, low noise and can work in shallow water. Its application field is gradually expanding, especially in high-performance ships. The current propulsion system adopts a water jet propulsion system. The existing water jet propulsion system mainly ...

AI Technical Summary

Problems solved by technology

[0002] At present, the water jet propulsion system is a new type of ship propulsion system with high efficiency, low noise, and can work in shallow water. Its application field is gradually expanding, especially in high-performance ships. The current propulsion system adopts a water jet propulsion system. The existing water jet propulsion system mainly uses sacrificial anodes and coating joint anti-corrosion. Practice shows that the installation space of the sacrificial anode in the flow channel of the water jet propulsion system is limited, and the larger sacrificial anode affects the flow channel. The water flow path increases the resistance, and the anode consumption rate increases at high flow rates, and the service life is greatly reduced

Marine environmental antifouling technology mainly uses antifouling coatings, electrolytic copper-aluminum anodes, and electrolytic seawater to produce chlorine to control the fouling of the flow channels of the sprinkler system. Since the current technology generally has poor erosion resistance for antifouling coatings, It is difficult to withstand the erosion of high-speed flowing seawater in the flow channel, so it is not suitable to use anti-fouling coatings; while the method of fouling control on electrolytic copper-aluminum anodes is that the copper ions produced will have a strong accelerated corrosion effect on aluminum alloys, and electrolytic copper cannot be used. The anti-fouling method of aluminum anode plays a good anti-corrosion and anti-fouling effect in the marine environment

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