[Significance] Biomass power generation plays a crucial role in China's efforts to achieve the “dual carbon” goal. The goal focuses on peaking carbon dioxide emissions and reaching carbon neutrality within a predefined timeline. However

high chlorine and alkali metal contents are naturally present in biomass fuels. Due to this characteristic

biomass boilers are prone to severe high-temperature corrosion during operation. The longterm reliability and safety of boiler systems are undermined by this issue. A systematic and comprehensive review of high-temperature corrosion in biomass boilers is provided in this paper. The corrosion mechanisms

influencing factors

and mitigation technologies are covered

with the aim of providing a valuable reference for both research and engineering practices. [Analysis] Firstly

the typical characteristics of high-temperature corrosion in biomassfired boilers are outlined. On this basis

the corrosion mechanisms involving key media such as chlorine

alkali metals

and sulfur are elaborated. Subsequently

the influence of multiple critical factors on corrosion behavior is analyzed in detail. The reaction rate of corrosive processes is directly regulated by temperature. The corrosive environment is changed by flue gas composition. The formation of protective or corrosive deposits is affected by ash composition. The intrinsic corrosion resistance of boiler components is determined by material properties.Finally

a series of prevention and control technologies are summarized. These technologies have been validated through laboratory experiments or long-term engineering practice. They include fuel pretreatment(to reduce corrosive constituents)

coating protection(to isolate metal surfaces from corrosive media)

additive inhibition(to suppress harmful chemical reactions)

and external fluidized beds(to optimize combustion and corrosion conditions). The unique application features

advantages

limitations and economic efficiency of each technology are also discussed. [Prospect] Future research can be deepened from three key aspects. First

advanced materials science should be integrated to elucidate the microscopic mechanisms of multi-medium coupled corrosion. Interface reactions and damage evolution processes at the atomic and molecular levels can be uncovered. Second

efforts should be intensified to develop novel high-performance protective materials. These materials should be endowed with exceptional high-temperature stability

corrosion resistance and mechanical strength. The harsh operating environments of biomass boilers must be withstood by them. Third

an integrated and collaborative control strategy should be established. This strategy is synergistically combined with fuel pretreatment

scientific additive selection

optimized operational parameters

and advanced material protection. Full-cycle

multi-dimensional corrosion control is the ultimate goal to be achieved. Through the synergistic innovation of mechanism research

advanced material development and systematic prevention-and-control technologies

it is expected to provide essential support for the safe

efficient

and low-cost operation of biomass boilers.