Metadata for a semi-field biofouling study on different stainless steels in the Gulf of Finland during early spring bloom

This dataset supports a manuscript titled "Corrosion and Biofouling Assessments on Different Stainless Steels in a Semi-field Brackish Seawater in Early Spring Bloom", investigating the impact of complex biofilms on stainless steel (SS) surfaces and biofouling assessment methods during the spring bloom in the Gulf of Finland. The dataset includes metadata of in-situ and ex-situ electrochemical measurements (OCP, cyclic cathodic and anodic polarizations), and microbial qPCR analysis.