The phrase "a certain erosion of" is correct and usable in written English.
It can be used to describe a gradual decline or weakening of something, often in a metaphorical sense.
Example: "There has been a certain erosion of trust between the two parties over the years."
Alternatives: "a gradual decline in" or "a slow deterioration of".
Past a certain point of erosion, the edge of the marsh moves beyond the low-tide point, and it becomes difficult for the grasses to grow back.
The compressive strength loss of SF specimens was very limited in the early state; after a certain period of erosion, the compressive strength decreased rapidly.
Eloise provided a comprehensive base of information on beach and dune erosion along the Florida panhandle, which aided in the programming of certain erosion prediction numerical models.
Without a certain level of wind erosion, opportunities for establishment of early-stage, species-rich vegetation types are diminished and open-sand habitat decreases by encroachment of the surrounding grassland vegetation.
And it is worth pointing out again that forced emancipation from a certain form of dress can be an erosion of personal choice and not a step towards freedom.
Polls also reflect a certain resignation about the erosion of privacy at a time of targeted online advertising, location-tracking cellphones and intrusive government programs.
However, the erosion is not complete and a certain layer of asphaltene deposits remain before the deposition process becomes dominant.
I believe our courts have been hijacked by a certain segment of the population that call themselves the law society... What I see is an erosion of our rights.
After having performed a certain number of divisions, they enter a special state termed senescence [1] which is the consequence of both the telomere erosion occurring at each replication cycle and of oxidative damages which increase with time.
A certain type of author.
