Degradation of Exhaust Valves in Medium-Speed Marine Diesel Engines: An Evidence-Tiered Review of Materials, Surface Engineering, and Qualification.

Lihe Jiang, Shuaikang Wang, Pengyang Li, Jinwei Long, Yanhong Wei

Abstract readReview

In one paragraph

Review in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Lihe JiangCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Road, Nanjing 211106, China.

Shuaikang WangCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Road, Nanjing 211106, China.

Pengyang LiCOSCO Shipping Marine Equipment & Spares (Nanjing) Co., Ltd., 18 Tangwei Road, Nanjing 211121, China.

Jinwei LongCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Road, Nanjing 211106, China.ORCID 0000-0001-7884-9520

Yanhong WeiCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Road, Nanjing 211106, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Exhaust valves in medium-speed marine diesel engines experience coupled combustion heating, intermittent seat cooling, repeated impact and microslip, deposit-assisted corrosion, and prolonged service. Their degradation therefore cannot be explained or qualified using a single room-temperature property. This review organizes the evidence within a mechanism-material-process-performance framework and separates marine observations from transferable valve studies and general materials data. A reference-seeded narrative synthesis was supplemented by a documented literature update completed in September 2026. Quantitative comparisons retain test temperature, geometry, exposure, measurement basis, and transfer limitations. The reported 10

Indexed as

evidence synthesisexhaust valvehardfacinghot corrosionmarine diesel engineremanufacturingthermo-mechanical fatiguevalve seat wear

Identifiers

PMID42882665

DOI10.3390/ma19194166

PMCPMC13666308

What OpenQuestion holds

Textmetadata

Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.