Pump device and ship propulsion machine

A pump device comprising:

• a first case having a first channel in which hydraulic fluid flows;
• a second case provided in contact with the first case and having a second channel that is connected to the first channel;
• and
• a sacrificial anode coupled to one of the first case and the second case and suppressing corrosion of the first case and the second case, wherein
• at least one of the first case and the second case comprises, in a portion in contact with other one of the first case and the second case, an insulating section that interrupts electric coupling to the other one,
• the pump device further comprising a conductive member provided at an inside of at least one of the first channel and the second channel and electrically coupling the first case and the second case.

A ship propulsion machine comprising:

• a ship propulsion machine main body comprising a propeller;
• and
• a tilt-trim device comprising a cylinder, a cylinder device comprising a piston that divides an inside of the cylinder into a first chamber and a second chamber and a piston rod, an end portion of which is fixed to the piston and which extends from the cylinder, and a pump device supplying hydraulic fluid to an inside of the cylinder device to thereby cause the cylinder device to expand and contract, wherein
• the pump device comprises:
• a first case having a channel in which hydraulic fluid flows;
• a second case provided in contact with the first case;
• and
• a sacrificial anode coupled to one of the first case and the second case and suppressing corrosion of the first case and the second case,
• at least one of the first case and the second case comprises an insulating section that interrupts electric coupling between the first case and the second case, and
• the pump device further comprising a valve member provided in the channel, controlling the flow of the hydraulic fluid flowing in the channel, and electrically coupling the first case and the second case.