Atmospheric environment corrosivity monitoring fiber grating sensor and corrosivity evaluation method

The invention relates to the technical field of corrosion sensing, and particularly discloses an atmospheric environment corrosivity monitoring fiber bragg grating sensor and a corrosivity evaluation method. Comprising a base, a first corrosion sensing unit, a second corrosion sensing unit, a third corrosion sensing unit, a fourth corrosion sensing unit, a temperature compensation unit, a first corrosion receptor, a second corrosion receptor, a third corrosion receptor and a fourth corrosion receptor, the first corrosion sensing unit, the second corrosion sensing unit, the third corrosion sensing unit and the fourth corrosion sensing unit are respectively embedded in the corresponding circular holes, and the temperature compensation unit is embedded in the base. The test carrier adopted by the corrosion receptor can accelerate the test process and shorten the atmospheric corrosion evaluation time, the Bragg grating obtains more accurate test data in real time and in situ, and the atmospheric corrosion grade c